1320142231 has 4 divisors (see below), whose sum is σ = 1352340864. Its totient is φ = 1287943600.

The previous prime is 1320142171. The next prime is 1320142237. The reversal of 1320142231 is 1322410231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1320142231 - 2²⁷ = 1185924503 is a prime.

It is a super-2 number, since 2×1320142231² = 3485551020139314722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320142199 and 1320142208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320142237) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 16099255 + ... + 16099336.

It is an arithmetic number, because the mean of its divisors is an integer number (338085216).

Almost surely, 2^1320142231 is an apocalyptic number.

1320142231 is a deficient number, since it is larger than the sum of its proper divisors (32198633).

1320142231 is an equidigital number, since it uses as much as digits as its factorization.

1320142231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32198632.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1320142231 is about 36333.7615861612. The cubic root of 1320142231 is about 1097.0007085422. Note that the first 3 decimals are identical.

Adding to 1320142231 its reverse (1322410231), we get a palindrome (2642552462).

The spelling of 1320142231 in words is "one billion, three hundred twenty million, one hundred forty-two thousand, two hundred thirty-one".