42398157 has 8 divisors (see below), whose sum is σ = 56561184. Its totient is φ = 28250288.

The previous prime is 42398149. The next prime is 42398159. The reversal of 42398157 is 75189324.

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 42398157 - 2³ = 42398149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42398159) 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, 7843 + ... + 12095.

It is an arithmetic number, because the mean of its divisors is an integer number (7070148).

Almost surely, 2^42398157 is an apocalyptic number.

It is an amenable number.

42398157 is a deficient number, since it is larger than the sum of its proper divisors (14163027).

42398157 is a wasteful number, since it uses less digits than its factorization.

42398157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579.

The product of its digits is 60480, while the sum is 39.

The square root of 42398157 is about 6511.3867186645. The cubic root of 42398157 is about 348.6976278289.

The spelling of 42398157 in words is "forty-two million, three hundred ninety-eight thousand, one hundred fifty-seven".