42158541 has 4 divisors (see below), whose sum is σ = 56211392. Its totient is φ = 28105692.

The previous prime is 42158531. The next prime is 42158579. The reversal of 42158541 is 14585124.

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 42158541 - 2¹³ = 42150349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42158499 and 42158508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42158531) 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, 7026421 + ... + 7026426.

It is an arithmetic number, because the mean of its divisors is an integer number (14052848).

Almost surely, 2^42158541 is an apocalyptic number.

It is an amenable number.

42158541 is a deficient number, since it is larger than the sum of its proper divisors (14052851).

42158541 is a wasteful number, since it uses less digits than its factorization.

42158541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14052850.

The product of its digits is 6400, while the sum is 30.

The square root of 42158541 is about 6492.9608808309. The cubic root of 42158541 is about 348.0394904980.

The spelling of 42158541 in words is "forty-two million, one hundred fifty-eight thousand, five hundred forty-one".