1255401233 has 4 divisors (see below), whose sum is σ = 1276679280. Its totient is φ = 1234123188.

The previous prime is 1255401209. The next prime is 1255401239. The reversal of 1255401233 is 3321045521.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3321045521 = 47 ⋅70660543.

It is a cyclic number.

It is not a de Polignac number, because 1255401233 - 2²⁰ = 1254352657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1255401239) 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, 10638935 + ... + 10639052.

It is an arithmetic number, because the mean of its divisors is an integer number (319169820).

Almost surely, 2^1255401233 is an apocalyptic number.

It is an amenable number.

1255401233 is a deficient number, since it is larger than the sum of its proper divisors (21278047).

1255401233 is an equidigital number, since it uses as much as digits as its factorization.

1255401233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21278046.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1255401233 is about 35431.6416921373. The cubic root of 1255401233 is about 1078.7666627930.

Adding to 1255401233 its reverse (3321045521), we get a palindrome (4576446754).

The spelling of 1255401233 in words is "one billion, two hundred fifty-five million, four hundred one thousand, two hundred thirty-three".