42740357 has 4 divisors (see below), whose sum is σ = 46625856. Its totient is φ = 38854860.

The previous prime is 42740353. The next prime is 42740359. The reversal of 42740357 is 75304724.

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 not a de Polignac number, because 42740357 - 2² = 42740353 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 (42740353) 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, 1942733 + ... + 1942754.

It is an arithmetic number, because the mean of its divisors is an integer number (11656464).

Almost surely, 2^42740357 is an apocalyptic number.

It is an amenable number.

42740357 is a deficient number, since it is larger than the sum of its proper divisors (3885499).

42740357 is a wasteful number, since it uses less digits than its factorization.

42740357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885498.

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 42740357 is about 6537.6109550814. The cubic root of 42740357 is about 349.6332403021.

The spelling of 42740357 in words is "forty-two million, seven hundred forty thousand, three hundred fifty-seven".