42702731 has 2 divisors, whose sum is σ = 42702732. Its totient is φ = 42702730.

The previous prime is 42702721. The next prime is 42702733. The reversal of 42702731 is 13720724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42702731 - 2¹⁰ = 42701707 is a prime.

It is a super-2 number, since 2×42702731² = 3647046469716722, which contains 22 as substring.

Together with 42702733, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42702731.

It is not a weakly prime, because it can be changed into another prime (42702733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21351365 + 21351366.

It is an arithmetic number, because the mean of its divisors is an integer number (21351366).

Almost surely, 2^42702731 is an apocalyptic number.

42702731 is a deficient number, since it is larger than the sum of its proper divisors (1).

42702731 is an equidigital number, since it uses as much as digits as its factorization.

42702731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 42702731 is about 6534.7326647691. The cubic root of 42702731 is about 349.5306115964.

The spelling of 42702731 in words is "forty-two million, seven hundred two thousand, seven hundred thirty-one".