1321391230 has 32 divisors (see below), whose sum is σ = 2448460224. Its totient is φ = 513217536.

The previous prime is 1321391189. The next prime is 1321391261. The reversal of 1321391230 is 321931231.

It is a junction number, because it is equal to n+sod(n) for n = 1321391195 and 1321391204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38559 + ... + 64261.

It is an arithmetic number, because the mean of its divisors is an integer number (76514382).

Almost surely, 2^1321391230 is an apocalyptic number.

1321391230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321391230 is a deficient number, since it is larger than the sum of its proper divisors (1127068994).

1321391230 is a wasteful number, since it uses less digits than its factorization.

1321391230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25860.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 1321391230 is about 36350.9453797284. The cubic root of 1321391230 is about 1097.3465603952.

The spelling of 1321391230 in words is "one billion, three hundred twenty-one million, three hundred ninety-one thousand, two hundred thirty".