1312001403 has 16 divisors (see below), whose sum is σ = 1775540736. Its totient is φ = 861586880.

The previous prime is 1312001399. The next prime is 1312001417. The reversal of 1312001403 is 3041002131.

It is a cyclic number.

It is not a de Polignac number, because 1312001403 - 2² = 1312001399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312001203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 340375 + ... + 344207.

It is an arithmetic number, because the mean of its divisors is an integer number (110971296).

Almost surely, 2^1312001403 is an apocalyptic number.

1312001403 is a deficient number, since it is larger than the sum of its proper divisors (463539333).

1312001403 is a wasteful number, since it uses less digits than its factorization.

1312001403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5514.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1312001403 is about 36221.5599194734. The cubic root of 1312001403 is about 1094.7411251834.

Adding to 1312001403 its reverse (3041002131), we get a palindrome (4353003534).

The spelling of 1312001403 in words is "one billion, three hundred twelve million, one thousand, four hundred three".