42613985 has 8 divisors (see below), whose sum is σ = 54144936. Its totient is φ = 32085760.

The previous prime is 42613981. The next prime is 42613997. The reversal of 42613985 is 58931624.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10995856 + 31618129 = 3316^2 + 5623^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42613985 - 2² = 42613981 is a prime.

It is a super-3 number, since 3×42613985³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42613981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250586 + ... + 250755.

It is an arithmetic number, because the mean of its divisors is an integer number (6768117).

Almost surely, 2^42613985 is an apocalyptic number.

It is an amenable number.

42613985 is a deficient number, since it is larger than the sum of its proper divisors (11530951).

42613985 is a wasteful number, since it uses less digits than its factorization.

42613985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501363.

The product of its digits is 51840, while the sum is 38.

The square root of 42613985 is about 6527.9388017965. The cubic root of 42613985 is about 349.2883089281.

The spelling of 42613985 in words is "forty-two million, six hundred thirteen thousand, nine hundred eighty-five".