53121265 has 8 divisors (see below), whose sum is σ = 63845928. Its totient is φ = 42430080.

The previous prime is 53121251. The next prime is 53121319. The reversal of 53121265 is 56212135.

It can be written as a sum of positive squares in 4 ways, for example, as 4804864 + 48316401 = 2192^2 + 6951^2 .

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

It is not a de Polignac number, because 53121265 - 2¹⁹ = 52596977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4732 + ... + 11341.

It is an arithmetic number, because the mean of its divisors is an integer number (7980741).

Almost surely, 2^53121265 is an apocalyptic number.

It is an amenable number.

53121265 is a deficient number, since it is larger than the sum of its proper divisors (10724663).

53121265 is a wasteful number, since it uses less digits than its factorization.

53121265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16739.

The product of its digits is 1800, while the sum is 25.

The square root of 53121265 is about 7288.4336451668. The cubic root of 53121265 is about 375.9148389635.

The spelling of 53121265 in words is "fifty-three million, one hundred twenty-one thousand, two hundred sixty-five".