1251433255 has 4 divisors (see below), whose sum is σ = 1501719912. Its totient is φ = 1001146600.

The previous prime is 1251433231. The next prime is 1251433273. The reversal of 1251433255 is 5523341521.

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

It is not a de Polignac number, because 1251433255 - 2¹⁵ = 1251400487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125143321 + ... + 125143330.

It is an arithmetic number, because the mean of its divisors is an integer number (375429978).

Almost surely, 2^1251433255 is an apocalyptic number.

1251433255 is a deficient number, since it is larger than the sum of its proper divisors (250286657).

1251433255 is an equidigital number, since it uses as much as digits as its factorization.

1251433255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250286656.

The product of its digits is 18000, while the sum is 31.

The square root of 1251433255 is about 35375.6025390381. The cubic root of 1251433255 is about 1077.6289016641.

Adding to 1251433255 its reverse (5523341521), we get a palindrome (6774774776).

The spelling of 1251433255 in words is "one billion, two hundred fifty-one million, four hundred thirty-three thousand, two hundred fifty-five".