1321310342 has 16 divisors (see below), whose sum is σ = 2208148992. Its totient is φ = 587816520.

The previous prime is 1321310339. The next prime is 1321310399. The reversal of 1321310342 is 2430131231.

It is a super-2 number, since 2×1321310342² = 3491722039752313928, 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 637898 + ... + 639965.

It is an arithmetic number, because the mean of its divisors is an integer number (138009312).

Almost surely, 2^1321310342 is an apocalyptic number.

1321310342 is a deficient number, since it is larger than the sum of its proper divisors (886838650).

1321310342 is a wasteful number, since it uses less digits than its factorization.

1321310342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277923.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1321310342 is about 36349.8327644021. The cubic root of 1321310342 is about 1097.3241688486.

Adding to 1321310342 its reverse (2430131231), we get a palindrome (3751441573).

The spelling of 1321310342 in words is "one billion, three hundred twenty-one million, three hundred ten thousand, three hundred forty-two".