42546731 has 4 divisors (see below), whose sum is σ = 42944472. Its totient is φ = 42148992.

The previous prime is 42546709. The next prime is 42546743. The reversal of 42546731 is 13764524.

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 42546731 - 2¹⁸ = 42284587 is a prime.

It is a super-2 number, since 2×42546731² = 3620448637572722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42546701) 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, 198710 + ... + 198923.

It is an arithmetic number, because the mean of its divisors is an integer number (10736118).

Almost surely, 2^42546731 is an apocalyptic number.

42546731 is a deficient number, since it is larger than the sum of its proper divisors (397741).

42546731 is a wasteful number, since it uses less digits than its factorization.

42546731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397740.

The product of its digits is 20160, while the sum is 32.

The square root of 42546731 is about 6522.7855246053. The cubic root of 42546731 is about 349.1044615774.

The spelling of 42546731 in words is "forty-two million, five hundred forty-six thousand, seven hundred thirty-one".