42957751 has 4 divisors (see below), whose sum is σ = 43501600. Its totient is φ = 42413904.

The previous prime is 42957683. The next prime is 42957757. The reversal of 42957751 is 15775924.

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 42957751 - 2¹³ = 42949559 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 (42957757) 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, 271806 + ... + 271963.

It is an arithmetic number, because the mean of its divisors is an integer number (10875400).

Almost surely, 2^42957751 is an apocalyptic number.

42957751 is a deficient number, since it is larger than the sum of its proper divisors (543849).

42957751 is an equidigital number, since it uses as much as digits as its factorization.

42957751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543848.

The product of its digits is 88200, while the sum is 40.

The square root of 42957751 is about 6554.2162765658. The cubic root of 42957751 is about 350.2250280791.

The spelling of 42957751 in words is "forty-two million, nine hundred fifty-seven thousand, seven hundred fifty-one".