161259426 has 12 divisors (see below), whose sum is σ = 349395462. Its totient is φ = 53753136.

The previous prime is 161259377. The next prime is 161259481. The reversal of 161259426 is 624952161.

161259426 is a `hidden beast` number, since 1 + 61 + 2 + 594 + 2 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 139216401 + 22043025 = 11799^2 + 4695^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4479411 + ... + 4479446.

Almost surely, 2^161259426 is an apocalyptic number.

161259426 is an abundant number, since it is smaller than the sum of its proper divisors (188136036).

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

161259426 is a wasteful number, since it uses less digits than its factorization.

161259426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8958865 (or 8958862 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 161259426 is about 12698.7962421641. The cubic root of 161259426 is about 544.3042222286.

The spelling of 161259426 in words is "one hundred sixty-one million, two hundred fifty-nine thousand, four hundred twenty-six".