2455645 has 4 divisors (see below), whose sum is σ = 2946780. Its totient is φ = 1964512.

The previous prime is 2455643. The next prime is 2455657. The reversal of 2455645 is 5465542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1493284 + 962361 = 1222^2 + 981^2 .

It is a cyclic number.

It is not a de Polignac number, because 2455645 - 2¹ = 2455643 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2455643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245560 + ... + 245569.

It is an arithmetic number, because the mean of its divisors is an integer number (736695).

2^2455645 is an apocalyptic number.

It is an amenable number.

2455645 is a deficient number, since it is larger than the sum of its proper divisors (491135).

2455645 is an equidigital number, since it uses as much as digits as its factorization.

2455645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491134.

The product of its digits is 24000, while the sum is 31.

The square root of 2455645 is about 1567.0497758527. The cubic root of 2455645 is about 134.9134332997.

The spelling of 2455645 in words is "two million, four hundred fifty-five thousand, six hundred forty-five".