53124921 has 12 divisors (see below), whose sum is σ = 78184548. Its totient is φ = 34748064.

The previous prime is 53124919. The next prime is 53124977. The reversal of 53124921 is 12942135.

It can be written as a sum of positive squares in 2 ways, for example, as 47073321 + 6051600 = 6861^2 + 2460^2 .

It is not a de Polignac number, because 53124921 - 2¹ = 53124919 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (53124991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55210 + ... + 56163.

It is an arithmetic number, because the mean of its divisors is an integer number (6515379).

Almost surely, 2^53124921 is an apocalyptic number.

It is an amenable number.

53124921 is a deficient number, since it is larger than the sum of its proper divisors (25059627).

53124921 is a wasteful number, since it uses less digits than its factorization.

53124921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111432 (or 111429 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 53124921 is about 7288.6844491993. The cubic root of 53124921 is about 375.9234627110.

It can be divided in two parts, 53124 and 921, that added together give a palindrome (54045).

The spelling of 53124921 in words is "fifty-three million, one hundred twenty-four thousand, nine hundred twenty-one".