1255781074 has 4 divisors (see below), whose sum is σ = 1883671614. Its totient is φ = 627890536.

The previous prime is 1255781029. The next prime is 1255781141. The reversal of 1255781074 is 4701875521.

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

It can be written as a sum of positive squares in only one way, i.e., 748405449 + 507375625 = 27357^2 + 22525^2 .

It is a super-2 number, since 2×1255781074² = 3153972211633186952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 313945267 + ... + 313945270.

Almost surely, 2^1255781074 is an apocalyptic number.

1255781074 is a deficient number, since it is larger than the sum of its proper divisors (627890540).

1255781074 is an equidigital number, since it uses as much as digits as its factorization.

1255781074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627890539.

The product of its (nonzero) digits is 78400, while the sum is 40.

The square root of 1255781074 is about 35437.0014815024. The cubic root of 1255781074 is about 1078.8754509843.

The spelling of 1255781074 in words is "one billion, two hundred fifty-five million, seven hundred eighty-one thousand, seventy-four".