1251102313 has 4 divisors (see below), whose sum is σ = 1251216468. Its totient is φ = 1250988160.

The previous prime is 1251102287. The next prime is 1251102317. The reversal of 1251102313 is 3132011521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 692110864 + 558991449 = 26308^2 + 23643^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1251102313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251102317) 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, 38656 + ... + 63217.

It is an arithmetic number, because the mean of its divisors is an integer number (312804117).

Almost surely, 2^1251102313 is an apocalyptic number.

It is an amenable number.

1251102313 is a deficient number, since it is larger than the sum of its proper divisors (114155).

1251102313 is a wasteful number, since it uses less digits than its factorization.

1251102313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114154.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 1251102313 is about 35370.9246839830. The cubic root of 1251102313 is about 1077.5339001649.

Adding to 1251102313 its reverse (3132011521), we get a palindrome (4383113834).

The spelling of 1251102313 in words is "one billion, two hundred fifty-one million, one hundred two thousand, three hundred thirteen".