42375621 has 4 divisors (see below), whose sum is σ = 56500832. Its totient is φ = 28250412.

The previous prime is 42375617. The next prime is 42375631. The reversal of 42375621 is 12657324.

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 not a de Polignac number, because 42375621 - 2² = 42375617 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 (42375601) 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, 7062601 + ... + 7062606.

It is an arithmetic number, because the mean of its divisors is an integer number (14125208).

Almost surely, 2^42375621 is an apocalyptic number.

It is an amenable number.

42375621 is a deficient number, since it is larger than the sum of its proper divisors (14125211).

42375621 is a wasteful number, since it uses less digits than its factorization.

42375621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14125210.

The product of its digits is 10080, while the sum is 30.

The square root of 42375621 is about 6509.6559816937. The cubic root of 42375621 is about 348.6358355010.

The spelling of 42375621 in words is "forty-two million, three hundred seventy-five thousand, six hundred twenty-one".