161025404 has 12 divisors (see below), whose sum is σ = 282319128. Its totient is φ = 80362800.

The previous prime is 161025379. The next prime is 161025407. The reversal of 161025404 is 404520161.

161025404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161025404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161025407) 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, 35042 + ... + 39369.

It is an arithmetic number, because the mean of its divisors is an integer number (23526594).

Almost surely, 2^161025404 is an apocalyptic number.

It is an amenable number.

161025404 is a deficient number, since it is larger than the sum of its proper divisors (121293724).

161025404 is a wasteful number, since it uses less digits than its factorization.

161025404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74956 (or 74954 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 161025404 is about 12689.5785588017. The cubic root of 161025404 is about 544.0407940501.

Adding to 161025404 its reverse (404520161), we get a palindrome (565545565).

The spelling of 161025404 in words is "one hundred sixty-one million, twenty-five thousand, four hundred four".