1325545787 has 4 divisors (see below), whose sum is σ = 1326179400. Its totient is φ = 1324912176.

The previous prime is 1325545769. The next prime is 1325545813. The reversal of 1325545787 is 7875455231.

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 1325545787 - 2⁸ = 1325545531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325548787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313658 + ... + 317855.

It is an arithmetic number, because the mean of its divisors is an integer number (331544850).

Almost surely, 2^1325545787 is an apocalyptic number.

1325545787 is a deficient number, since it is larger than the sum of its proper divisors (633613).

1325545787 is an equidigital number, since it uses as much as digits as its factorization.

1325545787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633612.

The product of its digits is 1176000, while the sum is 47.

The square root of 1325545787 is about 36408.0456355460. The cubic root of 1325545787 is about 1098.4954049160.

The spelling of 1325545787 in words is "one billion, three hundred twenty-five million, five hundred forty-five thousand, seven hundred eighty-seven".