42712645 has 4 divisors (see below), whose sum is σ = 51255180. Its totient is φ = 34170112.

The previous prime is 42712639. The next prime is 42712667. The reversal of 42712645 is 54621724.

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

It can be written as a sum of positive squares in 2 ways, for example, as 32638369 + 10074276 = 5713^2 + 3174^2 .

It is a cyclic number.

It is not a de Polignac number, because 42712645 - 2²⁵ = 9158213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4271260 + ... + 4271269.

It is an arithmetic number, because the mean of its divisors is an integer number (12813795).

Almost surely, 2^42712645 is an apocalyptic number.

It is an amenable number.

42712645 is a deficient number, since it is larger than the sum of its proper divisors (8542535).

42712645 is an equidigital number, since it uses as much as digits as its factorization.

42712645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8542534.

The product of its digits is 13440, while the sum is 31.

The square root of 42712645 is about 6535.4911827651. The cubic root of 42712645 is about 349.5576588778.

The spelling of 42712645 in words is "forty-two million, seven hundred twelve thousand, six hundred forty-five".