42137397 has 12 divisors (see below), whose sum is σ = 61863724. Its totient is φ = 27630720.

The previous prime is 42137369. The next prime is 42137399. The reversal of 42137397 is 79373124.

It can be written as a sum of positive squares in 2 ways, for example, as 998001 + 41139396 = 999^2 + 6414^2 .

It is not a de Polignac number, because 42137397 - 2⁸ = 42137141 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 (42137399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37828 + ... + 38925.

Almost surely, 2^42137397 is an apocalyptic number.

It is an amenable number.

42137397 is a deficient number, since it is larger than the sum of its proper divisors (19726327).

42137397 is a wasteful number, since it uses less digits than its factorization.

42137397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76820 (or 76817 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 42137397 is about 6491.3324518160. The cubic root of 42137397 is about 347.9812960617.

The spelling of 42137397 in words is "forty-two million, one hundred thirty-seven thousand, three hundred ninety-seven".