52721461 has 4 divisors (see below), whose sum is σ = 56776972. Its totient is φ = 48665952.

The previous prime is 52721443. The next prime is 52721479. The reversal of 52721461 is 16412725.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (52721443) and next prime (52721479).

It can be written as a sum of positive squares in 2 ways, for example, as 6345361 + 46376100 = 2519^2 + 6810^2 .

It is a cyclic number.

It is not a de Polignac number, because 52721461 - 2⁹ = 52720949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52721441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2027736 + ... + 2027761.

It is an arithmetic number, because the mean of its divisors is an integer number (14194243).

Almost surely, 2^52721461 is an apocalyptic number.

It is an amenable number.

52721461 is a deficient number, since it is larger than the sum of its proper divisors (4055511).

52721461 is a wasteful number, since it uses less digits than its factorization.

52721461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4055510.

The product of its digits is 3360, while the sum is 28.

The square root of 52721461 is about 7260.9545515724. The cubic root of 52721461 is about 374.9693865379.

The spelling of 52721461 in words is "fifty-two million, seven hundred twenty-one thousand, four hundred sixty-one".