2650861 has 16 divisors (see below), whose sum is σ = 3067200. Its totient is φ = 2274048.

The previous prime is 2650853. The next prime is 2650873. The reversal of 2650861 is 1680562.

It is a cyclic number.

It is not a de Polignac number, because 2650861 - 2³ = 2650853 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 (2650061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9226 + ... + 9508.

It is an arithmetic number, because the mean of its divisors is an integer number (191700).

2^2650861 is an apocalyptic number.

It is an amenable number.

2650861 is a deficient number, since it is larger than the sum of its proper divisors (416339).

2650861 is a wasteful number, since it uses less digits than its factorization.

2650861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2650861 is about 1628.1464921806. The cubic root of 2650861 is about 138.3977358546.

Subtracting from 2650861 its reverse (1680562), we obtain a cube (970299 = 99³).

It can be divided in two parts, 26508 and 61, that added together give a square (26569 = 163²).

The spelling of 2650861 in words is "two million, six hundred fifty thousand, eight hundred sixty-one".