1312251 has 8 divisors (see below), whose sum is σ = 1766160. Its totient is φ = 866592.

The previous prime is 1312237. The next prime is 1312277. The reversal of 1312251 is 1522131.

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

It is not a de Polignac number, because 1312251 - 2⁶ = 1312187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1312251.

It is not an unprimeable number, because it can be changed into a prime (1312211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1680 + ... + 2333.

It is an arithmetic number, because the mean of its divisors is an integer number (220770).

2^1312251 is an apocalyptic number.

1312251 is the 725-th centered pentagonal number.

1312251 is a deficient number, since it is larger than the sum of its proper divisors (453909).

1312251 is a wasteful number, since it uses less digits than its factorization.

1312251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125.

The product of its digits is 60, while the sum is 15.

The square root of 1312251 is about 1145.5352460750. The cubic root of 1312251 is about 109.4810542481.

Adding to 1312251 its reverse (1522131), we get a palindrome (2834382).

The spelling of 1312251 in words is "one million, three hundred twelve thousand, two hundred fifty-one".