3121432725 has 24 divisors (see below), whose sum is σ = 5167680160. Its totient is φ = 1662534720.

The previous prime is 3121432697. The next prime is 3121432733. The reversal of 3121432725 is 5272341213.

It is not a de Polignac number, because 3121432725 - 2¹¹ = 3121430677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3121432692 and 3121432701.

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, 29286 + ... + 84264.

Almost surely, 2^3121432725 is an apocalyptic number.

It is an amenable number.

3121432725 is a deficient number, since it is larger than the sum of its proper divisors (2046247435).

3121432725 is a wasteful number, since it uses less digits than its factorization.

3121432725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55749 (or 55744 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 3121432725 is about 55869.7836491247. The cubic root of 3121432725 is about 1461.4523492716.

Adding to 3121432725 its reverse (5272341213), we get a palindrome (8393773938).

The spelling of 3121432725 in words is "three billion, one hundred twenty-one million, four hundred thirty-two thousand, seven hundred twenty-five".