42591727 has 4 divisors (see below), whose sum is σ = 42633760. Its totient is φ = 42549696.

The previous prime is 42591719. The next prime is 42591733. The reversal of 42591727 is 72719524.

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 42591727 - 2³ = 42591719 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 (42591767) 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, 19458 + ... + 21535.

It is an arithmetic number, because the mean of its divisors is an integer number (10658440).

Almost surely, 2^42591727 is an apocalyptic number.

42591727 is a deficient number, since it is larger than the sum of its proper divisors (42033).

42591727 is a wasteful number, since it uses less digits than its factorization.

42591727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42032.

The product of its digits is 35280, while the sum is 37.

The square root of 42591727 is about 6526.2337530922. The cubic root of 42591727 is about 349.2274852873.

The spelling of 42591727 in words is "forty-two million, five hundred ninety-one thousand, seven hundred twenty-seven".