42611539 has 2 divisors, whose sum is σ = 42611540. Its totient is φ = 42611538.

The previous prime is 42611533. The next prime is 42611551. The reversal of 42611539 is 93511624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42611539 - 2¹³ = 42603347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42611539.

It is not a weakly prime, because it can be changed into another prime (42611533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21305769 + 21305770.

It is an arithmetic number, because the mean of its divisors is an integer number (21305770).

Almost surely, 2^42611539 is an apocalyptic number.

42611539 is a deficient number, since it is larger than the sum of its proper divisors (1).

42611539 is an equidigital number, since it uses as much as digits as its factorization.

42611539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 42611539 is about 6527.7514505379. The cubic root of 42611539 is about 349.2816258674.

The spelling of 42611539 in words is "forty-two million, six hundred eleven thousand, five hundred thirty-nine".