42560621 has 4 divisors (see below), whose sum is σ = 42895872. Its totient is φ = 42225372.

The previous prime is 42560519. The next prime is 42560647. The reversal of 42560621 is 12606524.

42560621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42560621 - 2¹⁰ = 42559597 is a prime.

It is a super-2 number, since 2×42560621² = 3622812919811282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42566621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167435 + ... + 167688.

It is an arithmetic number, because the mean of its divisors is an integer number (10723968).

Almost surely, 2^42560621 is an apocalyptic number.

It is an amenable number.

42560621 is a deficient number, since it is larger than the sum of its proper divisors (335251).

42560621 is a wasteful number, since it uses less digits than its factorization.

42560621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335250.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 42560621 is about 6523.8501668876. The cubic root of 42560621 is about 349.1424475227.

The spelling of 42560621 in words is "forty-two million, five hundred sixty thousand, six hundred twenty-one".