1251312 has 40 divisors (see below), whose sum is σ = 3273600. Its totient is φ = 411840.

The previous prime is 1251307. The next prime is 1251317. The reversal of 1251312 is 2131521.

It is an interprime number because it is at equal distance from previous prime (1251307) and next prime (1251317).

It is a junction number, because it is equal to n+sod(n) for n = 1251291 and 1251300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251317) 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, 6189 + ... + 6387.

It is an arithmetic number, because the mean of its divisors is an integer number (81840).

2^1251312 is an apocalyptic number.

1251312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1251312 is an abundant number, since it is smaller than the sum of its proper divisors (2022288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251312 is a wasteful number, since it uses less digits than its factorization.

1251312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341 (or 335 counting only the distinct ones).

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

The square root of 1251312 is about 1118.6205791062. The cubic root of 1251312 is about 107.7594095676.

Adding to 1251312 its reverse (2131521), we get a palindrome (3382833).

The spelling of 1251312 in words is "one million, two hundred fifty-one thousand, three hundred twelve".