3125304021 has 32 divisors (see below), whose sum is σ = 5070781440. Its totient is φ = 1671411456.

The previous prime is 3125303981. The next prime is 3125304037. The reversal of 3125304021 is 1204035213.

3125304021 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 3125304021 - 2¹¹ = 3125301973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3125304071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39450 + ... + 88356.

It is an arithmetic number, because the mean of its divisors is an integer number (158461920).

Almost surely, 2^3125304021 is an apocalyptic number.

It is an amenable number.

3125304021 is a deficient number, since it is larger than the sum of its proper divisors (1945477419).

3125304021 is a wasteful number, since it uses less digits than its factorization.

3125304021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49113.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 3125304021 is about 55904.4186178517. The cubic root of 3125304021 is about 1462.0562789182.

Adding to 3125304021 its reverse (1204035213), we get a palindrome (4329339234).

The spelling of 3125304021 in words is "three billion, one hundred twenty-five million, three hundred four thousand, twenty-one".