42515541 has 6 divisors (see below), whose sum is σ = 61411350. Its totient is φ = 28343688.

The previous prime is 42515531. The next prime is 42515549. The reversal of 42515541 is 14551524.

It can be written as a sum of positive squares in only one way, i.e., 31979025 + 10536516 = 5655^2 + 3246^2 .

It is not a de Polignac number, because 42515541 - 2⁹ = 42515029 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42515549) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2361966 + ... + 2361983.

It is an arithmetic number, because the mean of its divisors is an integer number (10235225).

Almost surely, 2^42515541 is an apocalyptic number.

It is an amenable number.

42515541 is a deficient number, since it is larger than the sum of its proper divisors (18895809).

42515541 is a wasteful number, since it uses less digits than its factorization.

42515541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4723955 (or 4723952 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 42515541 is about 6520.3942365474. The cubic root of 42515541 is about 349.0191339882.

The spelling of 42515541 in words is "forty-two million, five hundred fifteen thousand, five hundred forty-one".