3125154021 has 8 divisors (see below), whose sum is σ = 4545678624. Its totient is φ = 1894032720.

The previous prime is 3125154007. The next prime is 3125154041. The reversal of 3125154021 is 1204515213.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3125154021 - 2⁹ = 3125153509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3125153982 and 3125154000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3125154041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47350786 + ... + 47350851.

It is an arithmetic number, because the mean of its divisors is an integer number (568209828).

Almost surely, 2^3125154021 is an apocalyptic number.

It is an amenable number.

3125154021 is a deficient number, since it is larger than the sum of its proper divisors (1420524603).

3125154021 is a wasteful number, since it uses less digits than its factorization.

3125154021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94701651.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 3125154021 is about 55903.0770262246. The cubic root of 3125154021 is about 1462.0328879191.

Adding to 3125154021 its reverse (1204515213), we get a palindrome (4329669234).

The spelling of 3125154021 in words is "three billion, one hundred twenty-five million, one hundred fifty-four thousand, twenty-one".