56742571 has 4 divisors (see below), whose sum is σ = 58276192. Its totient is φ = 55208952.

The previous prime is 56742557. The next prime is 56742577. The reversal of 56742571 is 17524765.

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

It is a cyclic number.

It is not a de Polignac number, because 56742571 - 2²¹ = 54645419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1533583 = 56742571 / (5 + 6 + 7 + 4 + 2 + 5 + 7 + 1).

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 56742571.

It is not an unprimeable number, because it can be changed into a prime (56742577) 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, 766755 + ... + 766828.

It is an arithmetic number, because the mean of its divisors is an integer number (14569048).

Almost surely, 2^56742571 is an apocalyptic number.

56742571 is a deficient number, since it is larger than the sum of its proper divisors (1533621).

56742571 is a wasteful number, since it uses less digits than its factorization.

56742571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533620.

The product of its digits is 58800, while the sum is 37.

The square root of 56742571 is about 7532.7664904735. The cubic root of 56742571 is about 384.2698727726.

The spelling of 56742571 in words is "fifty-six million, seven hundred forty-two thousand, five hundred seventy-one".