42402637 has 4 divisors (see below), whose sum is σ = 43770496. Its totient is φ = 41034780.

The previous prime is 42402617. The next prime is 42402643. The reversal of 42402637 is 73620424.

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 a de Polignac number, because none of the positive numbers 2^k-42402637 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 (42402617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 683883 + ... + 683944.

It is an arithmetic number, because the mean of its divisors is an integer number (10942624).

Almost surely, 2^42402637 is an apocalyptic number.

It is an amenable number.

42402637 is a deficient number, since it is larger than the sum of its proper divisors (1367859).

42402637 is a wasteful number, since it uses less digits than its factorization.

42402637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367858.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 42402637 is about 6511.7307223195. The cubic root of 42402637 is about 348.7099091045.

The spelling of 42402637 in words is "forty-two million, four hundred two thousand, six hundred thirty-seven".