1255839877 has 4 divisors (see below), whose sum is σ = 1256020416. Its totient is φ = 1255659340.

The previous prime is 1255839863. The next prime is 1255839889. The reversal of 1255839877 is 7789385521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255839877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255831877) 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, 79399 + ... + 93892.

It is an arithmetic number, because the mean of its divisors is an integer number (314005104).

Almost surely, 2^1255839877 is an apocalyptic number.

It is an amenable number.

1255839877 is a deficient number, since it is larger than the sum of its proper divisors (180539).

1255839877 is an equidigital number, since it uses as much as digits as its factorization.

1255839877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180538.

The product of its digits is 4233600, while the sum is 55.

The square root of 1255839877 is about 35437.8311554192. The cubic root of 1255839877 is about 1078.8922904701.

It can be divided in two parts, 125583 and 9877, that added together give a triangular number (135460 = T₅₂₀).

The spelling of 1255839877 in words is "one billion, two hundred fifty-five million, eight hundred thirty-nine thousand, eight hundred seventy-seven".