42374561 has 4 divisors (see below), whose sum is σ = 42402324. Its totient is φ = 42346800.

The previous prime is 42374543. The next prime is 42374593. The reversal of 42374561 is 16547324.

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 31192225 + 11182336 = 5585^2 + 3344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42374561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42374531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11450 + ... + 14691.

It is an arithmetic number, because the mean of its divisors is an integer number (10600581).

Almost surely, 2^42374561 is an apocalyptic number.

It is an amenable number.

42374561 is a deficient number, since it is larger than the sum of its proper divisors (27763).

42374561 is a wasteful number, since it uses less digits than its factorization.

42374561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27762.

The product of its digits is 20160, while the sum is 32.

The square root of 42374561 is about 6509.5745636716. The cubic root of 42374561 is about 348.6329285067.

The spelling of 42374561 in words is "forty-two million, three hundred seventy-four thousand, five hundred sixty-one".