42590997 has 6 divisors (see below), whose sum is σ = 61520342. Its totient is φ = 28393992.

The previous prime is 42590981. The next prime is 42591011. The reversal of 42590997 is 79909524.

It can be written as a sum of positive squares in only one way, i.e., 42497361 + 93636 = 6519^2 + 306^2 .

It is not a de Polignac number, because 42590997 - 2⁴ = 42590981 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 (42590927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2366158 + ... + 2366175.

Almost surely, 2^42590997 is an apocalyptic number.

It is an amenable number.

42590997 is a deficient number, since it is larger than the sum of its proper divisors (18929345).

42590997 is a wasteful number, since it uses less digits than its factorization.

42590997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732339 (or 4732336 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 42590997 is about 6526.1778247302. The cubic root of 42590997 is about 349.2254900836.

The spelling of 42590997 in words is "forty-two million, five hundred ninety thousand, nine hundred ninety-seven".