2604645 has 12 divisors (see below), whose sum is σ = 4514796. Its totient is φ = 1389120.

The previous prime is 2604617. The next prime is 2604647. The reversal of 2604645 is 5464062.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 408321 + 2196324 = 639^2 + 1482^2 .

It is not a de Polignac number, because 2604645 - 2¹⁰ = 2603621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2604647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28896 + ... + 28985.

It is an arithmetic number, because the mean of its divisors is an integer number (376233).

2^2604645 is an apocalyptic number.

It is an amenable number.

2604645 is a deficient number, since it is larger than the sum of its proper divisors (1910151).

2604645 is a wasteful number, since it uses less digits than its factorization.

2604645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57892 (or 57889 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2604645 is about 1613.8912602775. The cubic root of 2604645 is about 137.5887251049.

It can be divided in two parts, 2604 and 645, that added together give a square (3249 = 57²).

The spelling of 2604645 in words is "two million, six hundred four thousand, six hundred forty-five".