1321402142 has 4 divisors (see below), whose sum is σ = 1982103216. Its totient is φ = 660701070.

The previous prime is 1321402123. The next prime is 1321402151. The reversal of 1321402142 is 2412041231.

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

It is a super-2 number, since 2×1321402142² = 3492207241764376328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330350534 + ... + 330350537.

It is an arithmetic number, because the mean of its divisors is an integer number (495525804).

Almost surely, 2^1321402142 is an apocalyptic number.

1321402142 is a deficient number, since it is larger than the sum of its proper divisors (660701074).

1321402142 is an equidigital number, since it uses as much as digits as its factorization.

1321402142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660701073.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1321402142 is about 36351.0954718011. The cubic root of 1321402142 is about 1097.3495810026.

Adding to 1321402142 its reverse (2412041231), we get a palindrome (3733443373).

The spelling of 1321402142 in words is "one billion, three hundred twenty-one million, four hundred two thousand, one hundred forty-two".