42013997 has 4 divisors (see below), whose sum is σ = 44225280. Its totient is φ = 39802716.

The previous prime is 42013991. The next prime is 42013999. The reversal of 42013997 is 79931024.

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 42013997 - 2¹² = 42009901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42013991) 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, 1105613 + ... + 1105650.

It is an arithmetic number, because the mean of its divisors is an integer number (11056320).

Almost surely, 2^42013997 is an apocalyptic number.

It is an amenable number.

42013997 is a deficient number, since it is larger than the sum of its proper divisors (2211283).

42013997 is a wasteful number, since it uses less digits than its factorization.

42013997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211282.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 42013997 is about 6481.8205004458. The cubic root of 42013997 is about 347.6412744419.

The spelling of 42013997 in words is "forty-two million, thirteen thousand, nine hundred ninety-seven".