52457409 has 16 divisors (see below), whose sum is σ = 79611840. Its totient is φ = 34117920.

The previous prime is 52457381. The next prime is 52457413. The reversal of 52457409 is 90475425.

52457409 is a `hidden beast` number, since 5 + 245 + 7 + 409 = 666.

It is not a de Polignac number, because 52457409 - 2⁷ = 52457281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52457479) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22587 + ... + 24800.

It is an arithmetic number, because the mean of its divisors is an integer number (4975740).

Almost surely, 2^52457409 is an apocalyptic number.

It is an amenable number.

52457409 is a deficient number, since it is larger than the sum of its proper divisors (27154431).

52457409 is a wasteful number, since it uses less digits than its factorization.

52457409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47437 (or 47431 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 52457409 is about 7242.7487185460. The cubic root of 52457409 is about 374.3423352799.

The spelling of 52457409 in words is "fifty-two million, four hundred fifty-seven thousand, four hundred nine".