1255523249 has 4 divisors (see below), whose sum is σ = 1321603440. Its totient is φ = 1189443060.

The previous prime is 1255523209. The next prime is 1255523261. The reversal of 1255523249 is 9423255521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1255523249 - 2²⁰ = 1254474673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255523209) 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, 33040067 + ... + 33040104.

It is an arithmetic number, because the mean of its divisors is an integer number (330400860).

Almost surely, 2^1255523249 is an apocalyptic number.

1255523249 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1255523249 is a deficient number, since it is larger than the sum of its proper divisors (66080191).

1255523249 is an equidigital number, since it uses as much as digits as its factorization.

1255523249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66080190.

The product of its digits is 108000, while the sum is 38.

The square root of 1255523249 is about 35433.3635010847. The cubic root of 1255523249 is about 1078.8016111228.

The spelling of 1255523249 in words is "one billion, two hundred fifty-five million, five hundred twenty-three thousand, two hundred forty-nine".