1312252141 has 4 divisors (see below), whose sum is σ = 1312332192. Its totient is φ = 1312172092.

The previous prime is 1312252133. The next prime is 1312252147. The reversal of 1312252141 is 1412522131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1312252141 - 2³ = 1312252133 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 (1312252147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5521 + ... + 51526.

It is an arithmetic number, because the mean of its divisors is an integer number (328083048).

Almost surely, 2^1312252141 is an apocalyptic number.

It is an amenable number.

1312252141 is a deficient number, since it is larger than the sum of its proper divisors (80051).

1312252141 is an equidigital number, since it uses as much as digits as its factorization.

1312252141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80050.

The product of its digits is 480, while the sum is 22.

The square root of 1312252141 is about 36225.0209247697. The cubic root of 1312252141 is about 1094.8108597928.

Adding to 1312252141 its reverse (1412522131), we get a palindrome (2724774272).

The spelling of 1312252141 in words is "one billion, three hundred twelve million, two hundred fifty-two thousand, one hundred forty-one".