161252612 has 12 divisors (see below), whose sum is σ = 282373980. Its totient is φ = 80574336.

The previous prime is 161252591. The next prime is 161252617. The reversal of 161252612 is 216252161.

It can be written as a sum of positive squares in 2 ways, for example, as 92428996 + 68823616 = 9614^2 + 8296^2 .

It is not an unprimeable number, because it can be changed into a prime (161252617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5537 + ... + 18792.

It is an arithmetic number, because the mean of its divisors is an integer number (23531165).

Almost surely, 2^161252612 is an apocalyptic number.

It is an amenable number.

161252612 is a deficient number, since it is larger than the sum of its proper divisors (121121368).

161252612 is a wasteful number, since it uses less digits than its factorization.

161252612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25990 (or 25988 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 161252612 is about 12698.5279461834. The cubic root of 161252612 is about 544.2965556148.

The spelling of 161252612 in words is "one hundred sixty-one million, two hundred fifty-two thousand, six hundred twelve".