1621146 has 8 divisors (see below), whose sum is σ = 3242304. Its totient is φ = 540380.

The previous prime is 1621141. The next prime is 1621153. The reversal of 1621146 is 6411261.

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

1621146 is an admirable number.

It is a super-2 number, since 2×1621146² = 5256228706632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1621141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135090 + ... + 135101.

It is an arithmetic number, because the mean of its divisors is an integer number (405288).

2^1621146 is an apocalyptic number.

1621146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1621146 is a wasteful number, since it uses less digits than its factorization.

1621146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270196.

The product of its digits is 288, while the sum is 21.

The square root of 1621146 is about 1273.2423178641. The cubic root of 1621146 is about 117.4737167710.

The spelling of 1621146 in words is "one million, six hundred twenty-one thousand, one hundred forty-six".