52437421 has 4 divisors (see below), whose sum is σ = 52789500. Its totient is φ = 52085344.

The previous prime is 52437391. The next prime is 52437439. The reversal of 52437421 is 12473425.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10692900 + 41744521 = 3270^2 + 6461^2 .

It is a cyclic number.

It is not a de Polignac number, because 52437421 - 2¹¹ = 52435373 is a prime.

It is a super-2 number, since 2×52437421² = 5499366242262482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52437421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52432421) 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, 175816 + ... + 176113.

It is an arithmetic number, because the mean of its divisors is an integer number (13197375).

Almost surely, 2^52437421 is an apocalyptic number.

It is an amenable number.

52437421 is a deficient number, since it is larger than the sum of its proper divisors (352079).

52437421 is a wasteful number, since it uses less digits than its factorization.

52437421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352078.

The product of its digits is 6720, while the sum is 28.

The square root of 52437421 is about 7241.3687242123. The cubic root of 52437421 is about 374.2947836548.

The spelling of 52437421 in words is "fifty-two million, four hundred thirty-seven thousand, four hundred twenty-one".