115421539 has 2 divisors, whose sum is σ = 115421540. Its totient is φ = 115421538.

The previous prime is 115421473. The next prime is 115421591. The reversal of 115421539 is 935124511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115421539 - 2²³ = 107032931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115421539.

It is not a weakly prime, because it can be changed into another prime (115421239) 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, 57710769 + 57710770.

It is an arithmetic number, because the mean of its divisors is an integer number (57710770).

Almost surely, 2^115421539 is an apocalyptic number.

115421539 is a deficient number, since it is larger than the sum of its proper divisors (1).

115421539 is an equidigital number, since it uses as much as digits as its factorization.

115421539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 115421539 is about 10743.4416738771. The cubic root of 115421539 is about 486.8878684701.

The spelling of 115421539 in words is "one hundred fifteen million, four hundred twenty-one thousand, five hundred thirty-nine".