1312224142 has 4 divisors (see below), whose sum is σ = 1968336216. Its totient is φ = 656112070.

The previous prime is 1312224091. The next prime is 1312224143. The reversal of 1312224142 is 2414222131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2414222131 = 29 ⋅83249039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312224143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328056034 + ... + 328056037.

It is an arithmetic number, because the mean of its divisors is an integer number (492084054).

Almost surely, 2^1312224142 is an apocalyptic number.

1312224142 is a deficient number, since it is larger than the sum of its proper divisors (656112074).

1312224142 is an equidigital number, since it uses as much as digits as its factorization.

1312224142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656112073.

The product of its digits is 768, while the sum is 22.

The square root of 1312224142 is about 36224.6344633041. The cubic root of 1312224142 is about 1094.8030732233.

Adding to 1312224142 its reverse (2414222131), we get a palindrome (3726446273).

The spelling of 1312224142 in words is "one billion, three hundred twelve million, two hundred twenty-four thousand, one hundred forty-two".