1157539 has 2 divisors, whose sum is σ = 1157540. Its totient is φ = 1157538.

The previous prime is 1157531. The next prime is 1157557. The reversal of 1157539 is 9357511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1157539 - 2³ = 1157531 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1157539.

It is not a weakly prime, because it can be changed into another prime (1157531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578769 + 578770.

It is an arithmetic number, because the mean of its divisors is an integer number (578770).

2^1157539 is an apocalyptic number.

1157539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157539 is an equidigital number, since it uses as much as digits as its factorization.

1157539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4725, while the sum is 31.

The square root of 1157539 is about 1075.8898642519. The cubic root of 1157539 is about 104.9973997844.

The spelling of 1157539 in words is "one million, one hundred fifty-seven thousand, five hundred thirty-nine".