42726731 has 2 divisors, whose sum is σ = 42726732. Its totient is φ = 42726730.

The previous prime is 42726727. The next prime is 42726743. The reversal of 42726731 is 13762724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42726731 - 2² = 42726727 is a prime.

It is a super-2 number, since 2×42726731² = 3651147083892722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42726791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21363365 + 21363366.

It is an arithmetic number, because the mean of its divisors is an integer number (21363366).

Almost surely, 2^42726731 is an apocalyptic number.

42726731 is a deficient number, since it is larger than the sum of its proper divisors (1).

42726731 is an equidigital number, since it uses as much as digits as its factorization.

42726731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 32.

The square root of 42726731 is about 6536.5687482042. The cubic root of 42726731 is about 349.5960809736.

The spelling of 42726731 in words is "forty-two million, seven hundred twenty-six thousand, seven hundred thirty-one".