42987015 has 12 divisors (see below), whose sum is σ = 74510904. Its totient is φ = 22926384.

The previous prime is 42987011. The next prime is 42987037. The reversal of 42987015 is 51078924.

It is not a de Polignac number, because 42987015 - 2² = 42987011 is a prime.

It is a super-2 number, since 2×42987015² = 3695766917220450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42987011) 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, 477589 + ... + 477678.

It is an arithmetic number, because the mean of its divisors is an integer number (6209242).

Almost surely, 2^42987015 is an apocalyptic number.

42987015 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42987015 is a deficient number, since it is larger than the sum of its proper divisors (31523889).

42987015 is a wasteful number, since it uses less digits than its factorization.

42987015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 955278 (or 955275 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 42987015 is about 6556.4483525763. The cubic root of 42987015 is about 350.3045376637.

The spelling of 42987015 in words is "forty-two million, nine hundred eighty-seven thousand, fifteen".