161025472 has 28 divisors (see below), whose sum is σ = 320959480. Its totient is φ = 80153856.

The previous prime is 161025457. The next prime is 161025503. The reversal of 161025472 is 274520161.

It is a self number, because there is not a number n which added to its sum of digits gives 161025472.

It is a congruent number.

It is an unprimeable number.

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, 9163 + ... + 20149.

Almost surely, 2^161025472 is an apocalyptic number.

It is an amenable number.

161025472 is a deficient number, since it is larger than the sum of its proper divisors (159934008).

161025472 is a wasteful number, since it uses less digits than its factorization.

161025472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11228 (or 11218 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 161025472 is about 12689.5812381654. The cubic root of 161025472 is about 544.0408706317.

The spelling of 161025472 in words is "one hundred sixty-one million, twenty-five thousand, four hundred seventy-two".