42011639 has 8 divisors (see below), whose sum is σ = 44040192. Its totient is φ = 39999960.

The previous prime is 42011621. The next prime is 42011663. The reversal of 42011639 is 93611024.

42011639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42011639 - 2⁸ = 42011383 is a prime.

It is a super-2 number, since 2×42011639² = 3529955622932642, 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 (42011609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1034 + ... + 9224.

It is an arithmetic number, because the mean of its divisors is an integer number (5505024).

Almost surely, 2^42011639 is an apocalyptic number.

42011639 is a deficient number, since it is larger than the sum of its proper divisors (2028553).

42011639 is a wasteful number, since it uses less digits than its factorization.

42011639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8437.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 42011639 is about 6481.6386045505. The cubic root of 42011639 is about 347.6347706295.

The spelling of 42011639 in words is "forty-two million, eleven thousand, six hundred thirty-nine".