1312203401 has 8 divisors (see below), whose sum is σ = 1344726600. Its totient is φ = 1279704960.

The previous prime is 1312203379. The next prime is 1312203419. The reversal of 1312203401 is 1043022131.

It can be written as a sum of positive squares in 4 ways, for example, as 22316176 + 1289887225 = 4724^2 + 35915^2 .

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 1312203401 - 2²² = 1308009097 is a prime.

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 1312203401.

It is not an unprimeable number, because it can be changed into a prime (1312203901) 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, 147755 + ... + 156383.

It is an arithmetic number, because the mean of its divisors is an integer number (168090825).

Almost surely, 2^1312203401 is an apocalyptic number.

It is an amenable number.

1312203401 is a deficient number, since it is larger than the sum of its proper divisors (32523199).

1312203401 is an equidigital number, since it uses as much as digits as its factorization.

1312203401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12379.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1312203401 is about 36224.3481790908. The cubic root of 1312203401 is about 1094.7973050446.

Adding to 1312203401 its reverse (1043022131), we get a palindrome (2355225532).

The spelling of 1312203401 in words is "one billion, three hundred twelve million, two hundred three thousand, four hundred one".