42157384 has 8 divisors (see below), whose sum is σ = 79045110. Its totient is φ = 21078688.

The previous prime is 42157373. The next prime is 42157391. The reversal of 42157384 is 48375124.

It can be written as a sum of positive squares in only one way, i.e., 38068900 + 4088484 = 6170^2 + 2022^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2634829 + ... + 2634844.

Almost surely, 2^42157384 is an apocalyptic number.

It is an amenable number.

42157384 is a deficient number, since it is larger than the sum of its proper divisors (36887726).

42157384 is a wasteful number, since it uses less digits than its factorization.

42157384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5269679 (or 5269675 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 42157384 is about 6492.8717837333. The cubic root of 42157384 is about 348.0363066009.

The spelling of 42157384 in words is "forty-two million, one hundred fifty-seven thousand, three hundred eighty-four".