1312253501 has 4 divisors (see below), whose sum is σ = 1413196092. Its totient is φ = 1211310912.

The previous prime is 1312253497. The next prime is 1312253531. The reversal of 1312253501 is 1053522131.

It is a happy number.

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 90820900 + 1221432601 = 9530^2 + 34949^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312253501 - 2² = 1312253497 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312253531) 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, 50471276 + ... + 50471301.

It is an arithmetic number, because the mean of its divisors is an integer number (353299023).

Almost surely, 2^1312253501 is an apocalyptic number.

It is an amenable number.

1312253501 is a deficient number, since it is larger than the sum of its proper divisors (100942591).

1312253501 is a wasteful number, since it uses less digits than its factorization.

1312253501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100942590.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1312253501 is about 36225.0396963206. The cubic root of 1312253501 is about 1094.8112380083.

Adding to 1312253501 its reverse (1053522131), we get a palindrome (2365775632).

The spelling of 1312253501 in words is "one billion, three hundred twelve million, two hundred fifty-three thousand, five hundred one".