1321310042 has 16 divisors (see below), whose sum is σ = 2135777280. Its totient is φ = 609448752.

The previous prime is 1321310033. The next prime is 1321310047. The reversal of 1321310042 is 2400131231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321310042.

It is not an unprimeable number, because it can be changed into a prime (1321310047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27959 + ... + 58517.

It is an arithmetic number, because the mean of its divisors is an integer number (133486080).

Almost surely, 2^1321310042 is an apocalyptic number.

1321310042 is a deficient number, since it is larger than the sum of its proper divisors (814467238).

1321310042 is a wasteful number, since it uses less digits than its factorization.

1321310042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32237.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1321310042 is about 36349.8286378354. The cubic root of 1321310042 is about 1097.3240858004.

Adding to 1321310042 its reverse (2400131231), we get a palindrome (3721441273).

The spelling of 1321310042 in words is "one billion, three hundred twenty-one million, three hundred ten thousand, forty-two".