161025004 has 12 divisors (see below), whose sum is σ = 322050064. Its totient is φ = 69010704.

The previous prime is 161024987. The next prime is 161025013. The reversal of 161025004 is 400520161.

161025004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

161025004 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2875419 + ... + 2875474.

Almost surely, 2^161025004 is an apocalyptic number.

161025004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161025004 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.

161025004 is a wasteful number, since it uses less digits than its factorization.

161025004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750904 (or 5750902 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 161025004 is about 12689.5627978272. The cubic root of 161025004 is about 544.0403435694.

Adding to 161025004 its reverse (400520161), we get a palindrome (561545165).

The spelling of 161025004 in words is "one hundred sixty-one million, twenty-five thousand, four".