2456645 has 4 divisors (see below), whose sum is σ = 2947980. Its totient is φ = 1965312.

The previous prime is 2456639. The next prime is 2456647. The reversal of 2456645 is 5466542.

2456645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5466542 = 2 ⋅2733271.

It can be written as a sum of positive squares in 2 ways, for example, as 833569 + 1623076 = 913^2 + 1274^2 .

It is a cyclic number.

It is not a de Polignac number, because 2456645 - 2⁶ = 2456581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2456647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245660 + ... + 245669.

It is an arithmetic number, because the mean of its divisors is an integer number (736995).

2^2456645 is an apocalyptic number.

It is an amenable number.

2456645 is a deficient number, since it is larger than the sum of its proper divisors (491335).

2456645 is an equidigital number, since it uses as much as digits as its factorization.

2456645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491334.

The product of its digits is 28800, while the sum is 32.

The square root of 2456645 is about 1567.3688142872. The cubic root of 2456645 is about 134.9317441880.

The spelling of 2456645 in words is "two million, four hundred fifty-six thousand, six hundred forty-five".