42157515 has 8 divisors (see below), whose sum is σ = 67452048. Its totient is φ = 22484000.

The previous prime is 42157499. The next prime is 42157519. The reversal of 42157515 is 51575124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42157515 - 2⁴ = 42157499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42157519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1405236 + ... + 1405265.

It is an arithmetic number, because the mean of its divisors is an integer number (8431506).

Almost surely, 2^42157515 is an apocalyptic number.

42157515 is a deficient number, since it is larger than the sum of its proper divisors (25294533).

42157515 is a wasteful number, since it uses less digits than its factorization.

42157515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2810509.

The product of its digits is 7000, while the sum is 30.

The square root of 42157515 is about 6492.8818717115. The cubic root of 42157515 is about 348.0366670969.

The spelling of 42157515 in words is "forty-two million, one hundred fifty-seven thousand, five hundred fifteen".