42015013 has 4 divisors (see below), whose sum is σ = 43370368. Its totient is φ = 40659660.

The previous prime is 42015011. The next prime is 42015019. The reversal of 42015013 is 31051024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42015013 - 2¹ = 42015011 is a prime.

It is a super-2 number, since 2×42015013² = 3530522634780338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42015011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 677631 + ... + 677692.

It is an arithmetic number, because the mean of its divisors is an integer number (10842592).

Almost surely, 2^42015013 is an apocalyptic number.

It is an amenable number.

42015013 is a deficient number, since it is larger than the sum of its proper divisors (1355355).

42015013 is a wasteful number, since it uses less digits than its factorization.

42015013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355354.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 42015013 is about 6481.8988730155. The cubic root of 42015013 is about 347.6440766881.

Adding to 42015013 its reverse (31051024), we get a palindrome (73066037).

The spelling of 42015013 in words is "forty-two million, fifteen thousand, thirteen".