42641531 has 2 divisors, whose sum is σ = 42641532. Its totient is φ = 42641530.

The previous prime is 42641527. The next prime is 42641537. The reversal of 42641531 is 13514624.

42641531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42641531 - 2² = 42641527 is a prime.

It is a super-2 number, since 2×42641531² = 3636600332047922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42641531.

It is not a weakly prime, because it can be changed into another prime (42641537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21320765 + 21320766.

It is an arithmetic number, because the mean of its divisors is an integer number (21320766).

Almost surely, 2^42641531 is an apocalyptic number.

42641531 is a deficient number, since it is larger than the sum of its proper divisors (1).

42641531 is an equidigital number, since it uses as much as digits as its factorization.

42641531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 42641531 is about 6530.0483152883. The cubic root of 42641531 is about 349.3635535797.

The spelling of 42641531 in words is "forty-two million, six hundred forty-one thousand, five hundred thirty-one".