115142509 has 2 divisors, whose sum is σ = 115142510. Its totient is φ = 115142508.

The previous prime is 115142501. The next prime is 115142539. The reversal of 115142509 is 905241511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62173225 + 52969284 = 7885^2 + 7278^2 .

It is a cyclic number.

It is not a de Polignac number, because 115142509 - 2³ = 115142501 is a prime.

It is equal to p_6580360 and since 115142509 and 6580360 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115142501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57571254 + 57571255.

It is an arithmetic number, because the mean of its divisors is an integer number (57571255).

Almost surely, 2^115142509 is an apocalyptic number.

It is an amenable number.

115142509 is a deficient number, since it is larger than the sum of its proper divisors (1).

115142509 is an equidigital number, since it uses as much as digits as its factorization.

115142509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 115142509 is about 10730.4477539383. The cubic root of 115142509 is about 486.4952036136.

It can be divided in two parts, 1151 and 42509, that added together give a triangular number (43660 = T₂₉₅).

The spelling of 115142509 in words is "one hundred fifteen million, one hundred forty-two thousand, five hundred nine".