1255681198 has 4 divisors (see below), whose sum is σ = 1883521800. Its totient is φ = 627840598.

The previous prime is 1255681171. The next prime is 1255681223. The reversal of 1255681198 is 8911865521.

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: 8911865521 = 13 ⋅685528117.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313920298 + ... + 313920301.

It is an arithmetic number, because the mean of its divisors is an integer number (470880450).

Almost surely, 2^1255681198 is an apocalyptic number.

1255681198 is a deficient number, since it is larger than the sum of its proper divisors (627840602).

1255681198 is an equidigital number, since it uses as much as digits as its factorization.

1255681198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627840601.

The product of its digits is 172800, while the sum is 46.

The square root of 1255681198 is about 35435.5922484724. The cubic root of 1255681198 is about 1078.8468481692.

The spelling of 1255681198 in words is "one billion, two hundred fifty-five million, six hundred eighty-one thousand, one hundred ninety-eight".