1251426212 has 12 divisors (see below), whose sum is σ = 2265513180. Its totient is φ = 604136736.

The previous prime is 1251426199. The next prime is 1251426221. The reversal of 1251426212 is 2126241521.

It can be written as a sum of positive squares in 2 ways, for example, as 197514916 + 1053911296 = 14054^2 + 32464^2 .

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, 5393963 + ... + 5394194.

It is an arithmetic number, because the mean of its divisors is an integer number (188792765).

Almost surely, 2^1251426212 is an apocalyptic number.

It is an amenable number.

1251426212 is a deficient number, since it is larger than the sum of its proper divisors (1014086968).

1251426212 is a wasteful number, since it uses less digits than its factorization.

1251426212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10788190 (or 10788188 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 1251426212 is about 35375.5029928904. The cubic root of 1251426212 is about 1077.6268800475.

Adding to 1251426212 its reverse (2126241521), we get a palindrome (3377667733).

The spelling of 1251426212 in words is "one billion, two hundred fifty-one million, four hundred twenty-six thousand, two hundred twelve".