1311402142 has 4 divisors (see below), whose sum is σ = 1967103216. Its totient is φ = 655701070.

The previous prime is 1311402119. The next prime is 1311402221. The reversal of 1311402142 is 2412041131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2412041131 = 1013 ⋅2381087.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327850534 + ... + 327850537.

It is an arithmetic number, because the mean of its divisors is an integer number (491775804).

Almost surely, 2^1311402142 is an apocalyptic number.

1311402142 is a deficient number, since it is larger than the sum of its proper divisors (655701074).

1311402142 is an equidigital number, since it uses as much as digits as its factorization.

1311402142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655701073.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1311402142 is about 36213.2868157531. The cubic root of 1311402142 is about 1094.5744242517.

Adding to 1311402142 its reverse (2412041131), we get a palindrome (3723443273).

The spelling of 1311402142 in words is "one billion, three hundred eleven million, four hundred two thousand, one hundred forty-two".