1662945 has 8 divisors (see below), whose sum is σ = 2660736. Its totient is φ = 886896.

The previous prime is 1662943. The next prime is 1662953. The reversal of 1662945 is 5492661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1662945 - 2¹ = 1662943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1662943) 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 7 ways as a sum of consecutive naturals, for example, 55417 + ... + 55446.

It is an arithmetic number, because the mean of its divisors is an integer number (332592).

2^1662945 is an apocalyptic number.

1662945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1662945 is a deficient number, since it is larger than the sum of its proper divisors (997791).

1662945 is a wasteful number, since it uses less digits than its factorization.

1662945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110871.

The product of its digits is 12960, while the sum is 33.

The square root of 1662945 is about 1289.5522478752. The cubic root of 1662945 is about 118.4747939053.

The spelling of 1662945 in words is "one million, six hundred sixty-two thousand, nine hundred forty-five".