1312403 has 8 divisors (see below), whose sum is σ = 1402368. Its totient is φ = 1225224.

The previous prime is 1312397. The next prime is 1312411. The reversal of 1312403 is 3042131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312403 - 2¹⁴ = 1296019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312303) 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, 326 + ... + 1652.

It is an arithmetic number, because the mean of its divisors is an integer number (175296).

2^1312403 is an apocalyptic number.

1312403 is a deficient number, since it is larger than the sum of its proper divisors (89965).

1312403 is a wasteful number, since it uses less digits than its factorization.

1312403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1312403 is about 1145.6015886860. The cubic root of 1312403 is about 109.4852812031.

Adding to 1312403 its reverse (3042131), we get a palindrome (4354534).

The spelling of 1312403 in words is "one million, three hundred twelve thousand, four hundred three".