1255979827 has 4 divisors (see below), whose sum is σ = 1263240000. Its totient is φ = 1248719656.

The previous prime is 1255979807. The next prime is 1255979843. The reversal of 1255979827 is 7289795521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7289795521 = 5197 ⋅1402693.

It is a cyclic number.

It is not a de Polignac number, because 1255979827 - 2¹⁵ = 1255947059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255979807) 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, 3629827 + ... + 3630172.

It is an arithmetic number, because the mean of its divisors is an integer number (315810000).

Almost surely, 2^1255979827 is an apocalyptic number.

1255979827 is a deficient number, since it is larger than the sum of its proper divisors (7260173).

1255979827 is an equidigital number, since it uses as much as digits as its factorization.

1255979827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7260172.

The product of its digits is 3175200, while the sum is 55.

The square root of 1255979827 is about 35439.8056851332. The cubic root of 1255979827 is about 1078.9323660059.

It can be divided in two parts, 125597 and 9827, that added together give a square (135424 = 368²).

The spelling of 1255979827 in words is "one billion, two hundred fifty-five million, nine hundred seventy-nine thousand, eight hundred twenty-seven".