42475815 has 48 divisors (see below), whose sum is σ = 76684608. Its totient is φ = 21731328.

The previous prime is 42475801. The next prime is 42475819. The reversal of 42475815 is 51857424.

It is not a de Polignac number, because 42475815 - 2⁶ = 42475751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42475815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42475819) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161374 + ... + 161636.

It is an arithmetic number, because the mean of its divisors is an integer number (1597596).

Almost surely, 2^42475815 is an apocalyptic number.

42475815 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42475815 is a deficient number, since it is larger than the sum of its proper divisors (34208793).

42475815 is a wasteful number, since it uses less digits than its factorization.

42475815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 405 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 42475815 is about 6517.3472364145. The cubic root of 42475815 is about 348.9103937134.

The spelling of 42475815 in words is "forty-two million, four hundred seventy-five thousand, eight hundred fifteen".