1255690235 has 4 divisors (see below), whose sum is σ = 1506828288. Its totient is φ = 1004552184.

The previous prime is 1255690141. The next prime is 1255690243. The reversal of 1255690235 is 5320965521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5320965521 = 23 ⋅231346327.

It is a cyclic number.

It is not a de Polignac number, because 1255690235 - 2²⁶ = 1188581371 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125569019 + ... + 125569028.

It is an arithmetic number, because the mean of its divisors is an integer number (376707072).

Almost surely, 2^1255690235 is an apocalyptic number.

1255690235 is a deficient number, since it is larger than the sum of its proper divisors (251138053).

1255690235 is an equidigital number, since it uses as much as digits as its factorization.

1255690235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251138052.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 1255690235 is about 35435.7197612804. The cubic root of 1255690235 is about 1078.8494362772.

The spelling of 1255690235 in words is "one billion, two hundred fifty-five million, six hundred ninety thousand, two hundred thirty-five".