42508541 has 4 divisors (see below), whose sum is σ = 42631392. Its totient is φ = 42385692.

The previous prime is 42508537. The next prime is 42508559. The reversal of 42508541 is 14580524.

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 42508541 - 2² = 42508537 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 (42508511) 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, 60905 + ... + 61598.

It is an arithmetic number, because the mean of its divisors is an integer number (10657848).

Almost surely, 2^42508541 is an apocalyptic number.

It is an amenable number.

42508541 is a deficient number, since it is larger than the sum of its proper divisors (122851).

42508541 is a wasteful number, since it uses less digits than its factorization.

42508541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122850.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 42508541 is about 6519.8574370917. The cubic root of 42508541 is about 348.9999781064. Note that the first 4 decimals are identical.

The spelling of 42508541 in words is "forty-two million, five hundred eight thousand, five hundred forty-one".