5072921 has 6 divisors (see below), whose sum is σ = 5901210. Its totient is φ = 4348176.

The previous prime is 5072897. The next prime is 5072939. The reversal of 5072921 is 1292705.

It can be written as a sum of positive squares in only one way, i.e., 3013696 + 2059225 = 1736^2 + 1435^2 .

It is a de Polignac number, because none of the positive numbers 2^k-5072921 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (5072621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51716 + ... + 51813.

It is an arithmetic number, because the mean of its divisors is an integer number (983535).

Almost surely, 2^5072921 is an apocalyptic number.

It is an amenable number.

5072921 is a deficient number, since it is larger than the sum of its proper divisors (828289).

5072921 is a wasteful number, since it uses less digits than its factorization.

5072921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103543 (or 103536 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 5072921 is about 2252.3145872635. The cubic root of 5072921 is about 171.8248735807.

The spelling of 5072921 in words is "five million, seventy-two thousand, nine hundred twenty-one".