42986915 has 8 divisors (see below), whose sum is σ = 51632208. Its totient is φ = 34357600.

The previous prime is 42986899. The next prime is 42986917. The reversal of 42986915 is 51968924.

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

It is not a de Polignac number, because 42986915 - 2⁴ = 42986899 is a prime.

It is a super-2 number, since 2×42986915² = 3695749722434450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42986917) 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, 3065 + ... + 9765.

It is an arithmetic number, because the mean of its divisors is an integer number (6454026).

Almost surely, 2^42986915 is an apocalyptic number.

42986915 is a deficient number, since it is larger than the sum of its proper divisors (8645293).

42986915 is a wasteful number, since it uses less digits than its factorization.

42986915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7989.

The product of its digits is 155520, while the sum is 44.

The square root of 42986915 is about 6556.4407264918. The cubic root of 42986915 is about 350.3042660276.

Subtracting 42986915 from its reverse (51968924), we obtain a square (8982009 = 2997²).

The spelling of 42986915 in words is "forty-two million, nine hundred eighty-six thousand, nine hundred fifteen".