161288825 has 12 divisors (see below), whose sum is σ = 201019500. Its totient is φ = 128372160.

The previous prime is 161288801. The next prime is 161288851. The reversal of 161288825 is 528882161.

It is a happy number.

161288825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 430336 + 160858489 = 656^2 + 12683^2 .

It is not a de Polignac number, because 161288825 - 2⁶ = 161288761 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11450 + ... + 21299.

It is an arithmetic number, because the mean of its divisors is an integer number (16751625).

Almost surely, 2^161288825 is an apocalyptic number.

It is an amenable number.

161288825 is a deficient number, since it is larger than the sum of its proper divisors (39730675).

161288825 is a wasteful number, since it uses less digits than its factorization.

161288825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32956 (or 32951 counting only the distinct ones).

The product of its digits is 61440, while the sum is 41.

The square root of 161288825 is about 12699.9537400732. The cubic root of 161288825 is about 544.3372973546.

The spelling of 161288825 in words is "one hundred sixty-one million, two hundred eighty-eight thousand, eight hundred twenty-five".