42424757 has 4 divisors (see below), whose sum is σ = 42490380. Its totient is φ = 42359136.

The previous prime is 42424727. The next prime is 42424763. The reversal of 42424757 is 75742424.

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 8213956 + 34210801 = 2866^2 + 5849^2 .

It is a cyclic number.

It is not a de Polignac number, because 42424757 - 2⁶ = 42424693 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 (42424727) 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, 31832 + ... + 33137.

It is an arithmetic number, because the mean of its divisors is an integer number (10622595).

Almost surely, 2^42424757 is an apocalyptic number.

It is an amenable number.

42424757 is a deficient number, since it is larger than the sum of its proper divisors (65623).

42424757 is an equidigital number, since it uses as much as digits as its factorization.

42424757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65622.

The product of its digits is 62720, while the sum is 35.

The square root of 42424757 is about 6513.4289740505. The cubic root of 42424757 is about 348.7705352262.

The spelling of 42424757 in words is "forty-two million, four hundred twenty-four thousand, seven hundred fifty-seven".