1255840567 has 2 divisors, whose sum is σ = 1255840568. Its totient is φ = 1255840566.

The previous prime is 1255840559. The next prime is 1255840577. The reversal of 1255840567 is 7650485521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1255840567 - 2³ = 1255840559 is a prime.

It is a super-3 number, since 3×1255840567³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255840577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627920283 + 627920284.

It is an arithmetic number, because the mean of its divisors is an integer number (627920284).

Almost surely, 2^1255840567 is an apocalyptic number.

1255840567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255840567 is an equidigital number, since it uses as much as digits as its factorization.

1255840567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336000, while the sum is 43.

The square root of 1255840567 is about 35437.8408907766. The cubic root of 1255840567 is about 1078.8924880631.

The spelling of 1255840567 in words is "one billion, two hundred fifty-five million, eight hundred forty thousand, five hundred sixty-seven".