1255536787 has 4 divisors (see below), whose sum is σ = 1260204480. Its totient is φ = 1250869096.

The previous prime is 1255536743. The next prime is 1255536847. The reversal of 1255536787 is 7876355521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7876355521 = 463 ⋅17011567.

It is a cyclic number.

It is not a de Polignac number, because 1255536787 - 2²³ = 1247148179 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255536787.

It is not an unprimeable number, because it can be changed into a prime (1255536287) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2333443 + ... + 2333980.

It is an arithmetic number, because the mean of its divisors is an integer number (315051120).

Almost surely, 2^1255536787 is an apocalyptic number.

1255536787 is a deficient number, since it is larger than the sum of its proper divisors (4667693).

1255536787 is an equidigital number, since it uses as much as digits as its factorization.

1255536787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4667692.

The product of its digits is 1764000, while the sum is 49.

The square root of 1255536787 is about 35433.5545352142. The cubic root of 1255536787 is about 1078.8054885934.

The spelling of 1255536787 in words is "one billion, two hundred fifty-five million, five hundred thirty-six thousand, seven hundred eighty-seven".