2645403 has 8 divisors (see below), whose sum is σ = 3609408. Its totient is φ = 1722504.

The previous prime is 2645399. The next prime is 2645413. The reversal of 2645403 is 3045462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2645403 - 2² = 2645399 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2645413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10125 + ... + 10382.

It is an arithmetic number, because the mean of its divisors is an integer number (451176).

2^2645403 is an apocalyptic number.

2645403 is a deficient number, since it is larger than the sum of its proper divisors (964005).

2645403 is a wasteful number, since it uses less digits than its factorization.

2645403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20553.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 2645403 is about 1626.4694894156. The cubic root of 2645403 is about 138.3026857478.

The spelling of 2645403 in words is "two million, six hundred forty-five thousand, four hundred three".