42515499 has 12 divisors (see below), whose sum is σ = 61384056. Its totient is φ = 26163072.

The previous prime is 42515491. The next prime is 42515507. The reversal of 42515499 is 99451524.

It is an interprime number because it is at equal distance from previous prime (42515491) and next prime (42515507).

It is not a de Polignac number, because 42515499 - 2³ = 42515491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (42515491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41422 + ... + 42435.

It is an arithmetic number, because the mean of its divisors is an integer number (5115338).

Almost surely, 2^42515499 is an apocalyptic number.

42515499 is a deficient number, since it is larger than the sum of its proper divisors (18868557).

42515499 is a wasteful number, since it uses less digits than its factorization.

42515499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83886 (or 83873 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 42515499 is about 6520.3910158824. The cubic root of 42515499 is about 349.0190190591.

The spelling of 42515499 in words is "forty-two million, five hundred fifteen thousand, four hundred ninety-nine".