42618761 has 4 divisors (see below), whose sum is σ = 42643524. Its totient is φ = 42594000.

The previous prime is 42618743. The next prime is 42618781. The reversal of 42618761 is 16781624.

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 19193161 + 23425600 = 4381^2 + 4840^2 .

It is a cyclic number.

It is not a de Polignac number, because 42618761 - 2²² = 38424457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42618781) 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, 9590 + ... + 13311.

It is an arithmetic number, because the mean of its divisors is an integer number (10660881).

Almost surely, 2^42618761 is an apocalyptic number.

It is an amenable number.

42618761 is a deficient number, since it is larger than the sum of its proper divisors (24763).

42618761 is a wasteful number, since it uses less digits than its factorization.

42618761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24762.

The product of its digits is 16128, while the sum is 35.

The square root of 42618761 is about 6528.3046038003. The cubic root of 42618761 is about 349.3013573725.

The spelling of 42618761 in words is "forty-two million, six hundred eighteen thousand, seven hundred sixty-one".