1251228230 has 24 divisors (see below), whose sum is σ = 2619919728. Its totient is φ = 428992368.

The previous prime is 1251228217. The next prime is 1251228239. The reversal of 1251228230 is 328221521.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1251228230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251228239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1276274 + ... + 1277253.

It is an arithmetic number, because the mean of its divisors is an integer number (109163322).

Almost surely, 2^1251228230 is an apocalyptic number.

1251228230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251228230 is an abundant number, since it is smaller than the sum of its proper divisors (1368691498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1251228230 is a wasteful number, since it uses less digits than its factorization.

1251228230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553548 (or 2553541 counting only the distinct ones).

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

The square root of 1251228230 is about 35372.7045898388. The cubic root of 1251228230 is about 1077.5700483635.

Adding to 1251228230 its reverse (328221521), we get a palindrome (1579449751).

The spelling of 1251228230 in words is "one billion, two hundred fifty-one million, two hundred twenty-eight thousand, two hundred thirty".