1313251 has 4 divisors (see below), whose sum is σ = 1315600. Its totient is φ = 1310904.

The previous prime is 1313239. The next prime is 1313293. The reversal of 1313251 is 1523131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1313251 - 2⁵ = 1313219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313651) 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, 205 + ... + 1633.

It is an arithmetic number, because the mean of its divisors is an integer number (328900).

2^1313251 is an apocalyptic number.

1313251 is a deficient number, since it is larger than the sum of its proper divisors (2349).

1313251 is an equidigital number, since it uses as much as digits as its factorization.

1313251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2348.

The product of its digits is 90, while the sum is 16.

The square root of 1313251 is about 1145.9716401377. The cubic root of 1313251 is about 109.5088571750.

Adding to 1313251 its reverse (1523131), we get a palindrome (2836382).

The spelling of 1313251 in words is "one million, three hundred thirteen thousand, two hundred fifty-one".