42479815 has 24 divisors (see below), whose sum is σ = 60041520. Its totient is φ = 28764288.

The previous prime is 42479783. The next prime is 42479819. The reversal of 42479815 is 51897424.

It is not a de Polignac number, because 42479815 - 2⁵ = 42479783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42479819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19291 + ... + 21379.

It is an arithmetic number, because the mean of its divisors is an integer number (2501730).

Almost surely, 2^42479815 is an apocalyptic number.

42479815 is a deficient number, since it is larger than the sum of its proper divisors (17561705).

42479815 is a wasteful number, since it uses less digits than its factorization.

42479815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191 (or 2184 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 42479815 is about 6517.6541025127. The cubic root of 42479815 is about 348.9213458106.

The spelling of 42479815 in words is "forty-two million, four hundred seventy-nine thousand, eight hundred fifteen".