42870491 has 4 divisors (see below), whose sum is σ = 43457832. Its totient is φ = 42283152.

The previous prime is 42870449. The next prime is 42870493. The reversal of 42870491 is 19407824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42870491 - 2¹⁴ = 42854107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42870493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293561 + ... + 293706.

It is an arithmetic number, because the mean of its divisors is an integer number (10864458).

Almost surely, 2^42870491 is an apocalyptic number.

42870491 is a deficient number, since it is larger than the sum of its proper divisors (587341).

42870491 is an equidigital number, since it uses as much as digits as its factorization.

42870491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587340.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 42870491 is about 6547.5561089616. The cubic root of 42870491 is about 349.9877301821.

The spelling of 42870491 in words is "forty-two million, eight hundred seventy thousand, four hundred ninety-one".