1255213423 has 4 divisors (see below), whose sum is σ = 1255763128. Its totient is φ = 1254663720.

The previous prime is 1255213403. The next prime is 1255213429. The reversal of 1255213423 is 3243125521.

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

It is a cyclic number.

It is not a de Polignac number, because 1255213423 - 2⁵ = 1255213391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1255213391 and 1255213400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255213429) 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, 271413 + ... + 275998.

It is an arithmetic number, because the mean of its divisors is an integer number (313940782).

Almost surely, 2^1255213423 is an apocalyptic number.

1255213423 is a deficient number, since it is larger than the sum of its proper divisors (549705).

1255213423 is an equidigital number, since it uses as much as digits as its factorization.

1255213423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549704.

The product of its digits is 7200, while the sum is 28.

The square root of 1255213423 is about 35428.9912783302. The cubic root of 1255213423 is about 1078.7128650467.

Adding to 1255213423 its reverse (3243125521), we get a palindrome (4498338944).

The spelling of 1255213423 in words is "one billion, two hundred fifty-five million, two hundred thirteen thousand, four hundred twenty-three".