42747577 has 4 divisors (see below), whose sum is σ = 42789760. Its totient is φ = 42705396.

The previous prime is 42747563. The next prime is 42747589. The reversal of 42747577 is 77574724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42747577 - 2⁷ = 42747449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42747517) 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, 19533 + ... + 21610.

It is an arithmetic number, because the mean of its divisors is an integer number (10697440).

Almost surely, 2^42747577 is an apocalyptic number.

It is an amenable number.

42747577 is a deficient number, since it is larger than the sum of its proper divisors (42183).

42747577 is a wasteful number, since it uses less digits than its factorization.

42747577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42182.

The product of its digits is 384160, while the sum is 43.

The square root of 42747577 is about 6538.1631212444. The cubic root of 42747577 is about 349.6529266910.

The spelling of 42747577 in words is "forty-two million, seven hundred forty-seven thousand, five hundred seventy-seven".