42702631 has 2 divisors, whose sum is σ = 42702632. Its totient is φ = 42702630.

The previous prime is 42702571. The next prime is 42702637. The reversal of 42702631 is 13620724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42702631 - 2¹⁵ = 42669863 is a prime.

It is a super-2 number, since 2×42702631² = 3647029388644322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42702596 and 42702605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42702637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21351315 + 21351316.

It is an arithmetic number, because the mean of its divisors is an integer number (21351316).

Almost surely, 2^42702631 is an apocalyptic number.

42702631 is a deficient number, since it is larger than the sum of its proper divisors (1).

42702631 is an equidigital number, since it uses as much as digits as its factorization.

42702631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 42702631 is about 6534.7250133422. The cubic root of 42702631 is about 349.5303387560.

It can be divided in two parts, 42702 and 631, that multiplied together give a palindrome (26944962).

The spelling of 42702631 in words is "forty-two million, seven hundred two thousand, six hundred thirty-one".