53121746 has 4 divisors (see below), whose sum is σ = 79682622. Its totient is φ = 26560872.

The previous prime is 53121721. The next prime is 53121749. The reversal of 53121746 is 64712135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64712135 = 5 ⋅12942427.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 2070721 = 7145^2 + 1439^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53121749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13280435 + ... + 13280438.

Almost surely, 2^53121746 is an apocalyptic number.

53121746 is a deficient number, since it is larger than the sum of its proper divisors (26560876).

53121746 is a wasteful number, since it uses less digits than its factorization.

53121746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26560875.

The product of its digits is 5040, while the sum is 29.

The square root of 53121746 is about 7288.4666425799. The cubic root of 53121746 is about 375.9159735656.

The spelling of 53121746 in words is "fifty-three million, one hundred twenty-one thousand, seven hundred forty-six".