1313428201 has 4 divisors (see below), whose sum is σ = 1313518804. Its totient is φ = 1313337600.

The previous prime is 1313428189. The next prime is 1313428247. The reversal of 1313428201 is 1028243131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 466560000 + 846868201 = 21600^2 + 29101^2 .

It is a 3-Lehmer number, since φ(1313428201) divides (1313428201-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1313428201 - 2²⁹ = 776557289 is a prime.

It is a deceptive number, since it divides R_1313428200.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313428601) 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, 18120 + ... + 54361.

It is an arithmetic number, because the mean of its divisors is an integer number (328379701).

It is a Poulet number, since it divides 2^1313428200-1.

Almost surely, 2^1313428201 is an apocalyptic number.

1313428201 is the 18121-st decagonal number.

It is an amenable number.

1313428201 is a deficient number, since it is larger than the sum of its proper divisors (90603).

1313428201 is an equidigital number, since it uses as much as digits as its factorization.

1313428201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90602.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1313428201 is about 36241.2499922395. The cubic root of 1313428201 is about 1095.1378240924.

The spelling of 1313428201 in words is "one billion, three hundred thirteen million, four hundred twenty-eight thousand, two hundred one".