2015261 has 4 divisors (see below), whose sum is σ = 2025024. Its totient is φ = 2005500.

The previous prime is 2015213. The next prime is 2015267. The reversal of 2015261 is 1625102.

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 2015261 - 2¹⁰ = 2014237 is a prime.

It is a super-2 number, since 2×2015261² = 8122553796242, 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 (2015267) 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, 4565 + ... + 4986.

It is an arithmetic number, because the mean of its divisors is an integer number (506256).

2^2015261 is an apocalyptic number.

It is an amenable number.

2015261 is a deficient number, since it is larger than the sum of its proper divisors (9763).

2015261 is an equidigital number, since it uses as much as digits as its factorization.

2015261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9762.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2015261 is about 1419.5988870100. The cubic root of 2015261 is about 126.3117542540.

The spelling of 2015261 in words is "two million, fifteen thousand, two hundred sixty-one".