2651605 has 16 divisors (see below), whose sum is σ = 3567744. Its totient is φ = 1874880.

The previous prime is 2651603. The next prime is 2651611. The reversal of 2651605 is 5061562.

It is not a de Polignac number, because 2651605 - 2¹ = 2651603 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2651605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651603) 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, 1384 + ... + 2686.

It is an arithmetic number, because the mean of its divisors is an integer number (222984).

2^2651605 is an apocalyptic number.

It is an amenable number.

2651605 is a deficient number, since it is larger than the sum of its proper divisors (916139).

2651605 is a wasteful number, since it uses less digits than its factorization.

2651605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 2651605 is about 1628.3749568204. The cubic root of 2651605 is about 138.4106823757.

The spelling of 2651605 in words is "two million, six hundred fifty-one thousand, six hundred five".