42402039 has 8 divisors (see below), whose sum is σ = 56779632. Its totient is φ = 28146240.

The previous prime is 42402023. The next prime is 42402043. The reversal of 42402039 is 93020424.

It is a happy number.

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

It is not a de Polignac number, because 42402039 - 2⁴ = 42402023 is a prime.

It is a super-2 number, since 2×42402039² = 3595865822715042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42402049) 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, 29632 + ... + 31029.

It is an arithmetic number, because the mean of its divisors is an integer number (7097454).

Almost surely, 2^42402039 is an apocalyptic number.

42402039 is a deficient number, since it is larger than the sum of its proper divisors (14377593).

42402039 is a wasteful number, since it uses less digits than its factorization.

42402039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60897.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 42402039 is about 6511.6848050255. The cubic root of 42402039 is about 348.7082698235.

The spelling of 42402039 in words is "forty-two million, four hundred two thousand, thirty-nine".