1320535140 has 24 divisors (see below), whose sum is σ = 3697498560. Its totient is φ = 352142688.

The previous prime is 1320535057. The next prime is 1320535157. The reversal of 1320535140 is 415350231.

It is a self number, because there is not a number n which added to its sum of digits gives 1320535140.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11004400 + ... + 11004519.

It is an arithmetic number, because the mean of its divisors is an integer number (154062440).

Almost surely, 2^1320535140 is an apocalyptic number.

1320535140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320535140 is an abundant number, since it is smaller than the sum of its proper divisors (2376963420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320535140 is a wasteful number, since it uses less digits than its factorization.

1320535140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22008931 (or 22008929 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1320535140 is about 36339.1681247659. The cubic root of 1320535140 is about 1097.1095298211.

Adding to 1320535140 its reverse (415350231), we get a palindrome (1735885371).

The spelling of 1320535140 in words is "one billion, three hundred twenty million, five hundred thirty-five thousand, one hundred forty".