161107725 has 24 divisors (see below), whose sum is σ = 282035520. Its totient is φ = 80869120.

The previous prime is 161107703. The next prime is 161107741. The reversal of 161107725 is 527701161.

161107725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161107725 - 2¹¹ = 161105677 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161107692 and 161107701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61905 + ... + 64454.

It is an arithmetic number, because the mean of its divisors is an integer number (11751480).

Almost surely, 2^161107725 is an apocalyptic number.

161107725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161107725 is a deficient number, since it is larger than the sum of its proper divisors (120927795).

161107725 is a wasteful number, since it uses less digits than its factorization.

161107725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126389 (or 126384 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 30.

The square root of 161107725 is about 12692.8217902876. The cubic root of 161107725 is about 544.1334882281.

Adding to 161107725 its reverse (527701161), we get a palindrome (688808886).

The spelling of 161107725 in words is "one hundred sixty-one million, one hundred seven thousand, seven hundred twenty-five".