115515142 has 4 divisors (see below), whose sum is σ = 173272716. Its totient is φ = 57757570.

The previous prime is 115515137. The next prime is 115515173. The reversal of 115515142 is 241515511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241515511 = 883 ⋅273517.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28878784 + ... + 28878787.

It is an arithmetic number, because the mean of its divisors is an integer number (43318179).

Almost surely, 2^115515142 is an apocalyptic number.

115515142 is a deficient number, since it is larger than the sum of its proper divisors (57757574).

115515142 is an equidigital number, since it uses as much as digits as its factorization.

115515142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57757573.

The product of its digits is 1000, while the sum is 25.

The square root of 115515142 is about 10747.7970766106. The cubic root of 115515142 is about 487.0194494887.

The spelling of 115515142 in words is "one hundred fifteen million, five hundred fifteen thousand, one hundred forty-two".