42015807 has 16 divisors (see below), whose sum is σ = 63101280. Its totient is φ = 27625536.

The previous prime is 42015793. The next prime is 42015851. The reversal of 42015807 is 70851024.

It is not a de Polignac number, because 42015807 - 2¹⁰ = 42014783 is a prime.

It is a super-2 number, since 2×42015807² = 3530656075722498, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42015877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8688 + ... + 12629.

It is an arithmetic number, because the mean of its divisors is an integer number (3943830).

Almost surely, 2^42015807 is an apocalyptic number.

42015807 is a deficient number, since it is larger than the sum of its proper divisors (21085473).

42015807 is a wasteful number, since it uses less digits than its factorization.

42015807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21399 (or 21393 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 42015807 is about 6481.9601202106. The cubic root of 42015807 is about 347.6462666010.

The spelling of 42015807 in words is "forty-two million, fifteen thousand, eight hundred seven".