42310661 has 4 divisors (see below), whose sum is σ = 42820512. Its totient is φ = 41800812.

The previous prime is 42310657. The next prime is 42310693. The reversal of 42310661 is 16601324.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 42310661 - 2² = 42310657 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 (42310601) 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, 254801 + ... + 254966.

It is an arithmetic number, because the mean of its divisors is an integer number (10705128).

Almost surely, 2^42310661 is an apocalyptic number.

It is an amenable number.

42310661 is a deficient number, since it is larger than the sum of its proper divisors (509851).

42310661 is an equidigital number, since it uses as much as digits as its factorization.

42310661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509850.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42310661 is about 6504.6645570698. The cubic root of 42310661 is about 348.4575964908.

Adding to 42310661 its reverse (16601324), we get a palindrome (58911985).

The spelling of 42310661 in words is "forty-two million, three hundred ten thousand, six hundred sixty-one".