1320157000 has 32 divisors (see below), whose sum is σ = 3089169720. Its totient is φ = 528062400.

The previous prime is 1320156977. The next prime is 1320157001. The reversal of 1320157000 is 7510231.

It can be written as a sum of positive squares in 4 ways, for example, as 319193956 + 1000963044 = 17866^2 + 31638^2 .

It is not an unprimeable number, because it can be changed into a prime (1320157001) 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, 659079 + ... + 661078.

Almost surely, 2^1320157000 is an apocalyptic number.

1320157000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320157000 is an abundant number, since it is smaller than the sum of its proper divisors (1769012720).

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

1320157000 is a wasteful number, since it uses less digits than its factorization.

1320157000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320178 (or 1320164 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1320157000 is about 36333.9648263164. The cubic root of 1320157000 is about 1097.0047994002.

Adding to 1320157000 its reverse (7510231), we get a palindrome (1327667231).

The spelling of 1320157000 in words is "one billion, three hundred twenty million, one hundred fifty-seven thousand".