1264503 has 4 divisors (see below), whose sum is σ = 1686008. Its totient is φ = 843000.

The previous prime is 1264499. The next prime is 1264537. The reversal of 1264503 is 3054621.

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: 3054621 = 3 ⋅1018207.

It is not a de Polignac number, because 1264503 - 2² = 1264499 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1264503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210748 + ... + 210753.

It is an arithmetic number, because the mean of its divisors is an integer number (421502).

2^1264503 is an apocalyptic number.

1264503 is a deficient number, since it is larger than the sum of its proper divisors (421505).

1264503 is an equidigital number, since it uses as much as digits as its factorization.

1264503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421504.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1264503 is about 1124.5012227650. The cubic root of 1264503 is about 108.1367437989.

The spelling of 1264503 in words is "one million, two hundred sixty-four thousand, five hundred three".