2115539 has 2 divisors, whose sum is σ = 2115540. Its totient is φ = 2115538.

The previous prime is 2115527. The next prime is 2115571. The reversal of 2115539 is 9355112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2115539 - 2⁴ = 2115523 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057769 + 1057770.

It is an arithmetic number, because the mean of its divisors is an integer number (1057770).

2^2115539 is an apocalyptic number.

2115539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115539 is an equidigital number, since it uses as much as digits as its factorization.

2115539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 26.

The square root of 2115539 is about 1454.4892574371. The cubic root of 2115539 is about 128.3729964920.

The spelling of 2115539 in words is "two million, one hundred fifteen thousand, five hundred thirty-nine".