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1662421 = 3374933
BaseRepresentation
bin110010101110111010101
310010110102011
412111313111
5411144141
655344221
720062465
oct6256725
93113364
101662421
11a36002
12682071
134628a7
14313ba5
1522c881
hex195dd5

1662421 has 4 divisors (see below), whose sum is σ = 1667692. Its totient is φ = 1657152.

The previous prime is 1662403. The next prime is 1662439. The reversal of 1662421 is 1242661.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1662403) and next prime (1662439).

It can be written as a sum of positive squares in 2 ways, for example, as 483025 + 1179396 = 695^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 1662421 - 25 = 1662389 is a prime.

It is a super-3 number, since 3×16624213 = 13783017377910733383, which contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1662392 and 1662401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2130 + ... + 2803.

It is an arithmetic number, because the mean of its divisors is an integer number (416923).

21662421 is an apocalyptic number.

It is an amenable number.

1662421 is a deficient number, since it is larger than the sum of its proper divisors (5271).

1662421 is an equidigital number, since it uses as much as digits as its factorization.

1662421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270.

The product of its digits is 576, while the sum is 22.

The square root of 1662421 is about 1289.3490605728. The cubic root of 1662421 is about 118.4623486523.

The spelling of 1662421 in words is "one million, six hundred sixty-two thousand, four hundred twenty-one".

Divisors: 1 337 4933 1662421