1320753187 has 8 divisors (see below), whose sum is σ = 1439487504. Its totient is φ = 1204467168.

The previous prime is 1320753139. The next prime is 1320753193. The reversal of 1320753187 is 7813570231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320753187 - 2²⁷ = 1186535459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320753107) 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, 610948 + ... + 613105.

It is an arithmetic number, because the mean of its divisors is an integer number (179935938).

Almost surely, 2^1320753187 is an apocalyptic number.

1320753187 is a deficient number, since it is larger than the sum of its proper divisors (118734317).

1320753187 is a wasteful number, since it uses less digits than its factorization.

1320753187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224149.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 1320753187 is about 36342.1681659199. The cubic root of 1320753187 is about 1097.1699114721.

The spelling of 1320753187 in words is "one billion, three hundred twenty million, seven hundred fifty-three thousand, one hundred eighty-seven".