2015541 has 12 divisors (see below), whose sum is σ = 3176160. Its totient is φ = 1221480.

The previous prime is 2015509. The next prime is 2015543. The reversal of 2015541 is 1455102.

It is not a de Polignac number, because 2015541 - 2⁵ = 2015509 is a prime.

It is a plaindrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10081 + ... + 10278.

It is an arithmetic number, because the mean of its divisors is an integer number (264680).

2^2015541 is an apocalyptic number.

It is an amenable number.

2015541 is a deficient number, since it is larger than the sum of its proper divisors (1160619).

2015541 is a wasteful number, since it uses less digits than its factorization.

2015541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20376 (or 20373 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 2015541 is about 1419.6975029914. The cubic root of 2015541 is about 126.3176038939.

It can be divided in two parts, 2015 and 541, that added together give a triangular number (2556 = T₇₁).

The spelling of 2015541 in words is "two million, fifteen thousand, five hundred forty-one".