1264403 has 4 divisors (see below), whose sum is σ = 1445040. Its totient is φ = 1083768.

The previous prime is 1264387. The next prime is 1264411. The reversal of 1264403 is 3044621.

1264403 = 422² + 423² + ... + 428².

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3044621 = 239 ⋅12739.

It is not a de Polignac number, because 1264403 - 2⁴ = 1264387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264303) 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, 90308 + ... + 90321.

It is an arithmetic number, because the mean of its divisors is an integer number (361260).

2^1264403 is an apocalyptic number.

1264403 is a deficient number, since it is larger than the sum of its proper divisors (180637).

1264403 is an equidigital number, since it uses as much as digits as its factorization.

1264403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180636.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1264403 is about 1124.4567577279. The cubic root of 1264403 is about 108.1338931507.

The spelling of 1264403 in words is "one million, two hundred sixty-four thousand, four hundred three".