2649405 has 16 divisors (see below), whose sum is σ = 4624704. Its totient is φ = 1284480.

The previous prime is 2649403. The next prime is 2649421. The reversal of 2649405 is 5049462.

It is not a de Polignac number, because 2649405 - 2¹ = 2649403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649403) 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, 7864 + ... + 8193.

It is an arithmetic number, because the mean of its divisors is an integer number (289044).

2^2649405 is an apocalyptic number.

It is an amenable number.

2649405 is a deficient number, since it is larger than the sum of its proper divisors (1975299).

2649405 is a wasteful number, since it uses less digits than its factorization.

2649405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16076.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 2649405 is about 1627.6992965533. The cubic root of 2649405 is about 138.3723926412.

It can be divided in two parts, 264 and 9405, that added together give a palindrome (9669).

The spelling of 2649405 in words is "two million, six hundred forty-nine thousand, four hundred five".