1255877863 has 4 divisors (see below), whose sum is σ = 1260653328. Its totient is φ = 1251102400.

The previous prime is 1255877807. The next prime is 1255877899. The reversal of 1255877863 is 3687785521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255877863 is a prime.

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 1255877863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255877803) 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, 2387338 + ... + 2387863.

It is an arithmetic number, because the mean of its divisors is an integer number (315163332).

Almost surely, 2^1255877863 is an apocalyptic number.

1255877863 is a deficient number, since it is larger than the sum of its proper divisors (4775465).

1255877863 is an equidigital number, since it uses as much as digits as its factorization.

1255877863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4775464.

The product of its digits is 2822400, while the sum is 52.

The square root of 1255877863 is about 35438.3671040301. The cubic root of 1255877863 is about 1078.9031682872.

The spelling of 1255877863 in words is "one billion, two hundred fifty-five million, eight hundred seventy-seven thousand, eight hundred sixty-three".