42750051 has 4 divisors (see below), whose sum is σ = 57000072. Its totient is φ = 28500032.

The previous prime is 42750049. The next prime is 42750067. The reversal of 42750051 is 15005724.

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 42750051 - 2¹ = 42750049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42750011) 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, 7125006 + ... + 7125011.

It is an arithmetic number, because the mean of its divisors is an integer number (14250018).

Almost surely, 2^42750051 is an apocalyptic number.

42750051 is a deficient number, since it is larger than the sum of its proper divisors (14250021).

42750051 is a wasteful number, since it uses less digits than its factorization.

42750051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14250020.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 42750051 is about 6538.3523153773. The cubic root of 42750051 is about 349.6596719049.

Adding to 42750051 its reverse (15005724), we get a palindrome (57755775).

The spelling of 42750051 in words is "forty-two million, seven hundred fifty thousand, fifty-one".