1251428344 has 64 divisors (see below), whose sum is σ = 2617401600. Its totient is φ = 557889024.

The previous prime is 1251428341. The next prime is 1251428357. The reversal of 1251428344 is 4438241521.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251428341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 332827 + ... + 336565.

It is an arithmetic number, because the mean of its divisors is an integer number (40896900).

Almost surely, 2^1251428344 is an apocalyptic number.

It is an amenable number.

1251428344 is an abundant number, since it is smaller than the sum of its proper divisors (1365973256).

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

1251428344 is a wasteful number, since it uses less digits than its factorization.

1251428344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892 (or 3888 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 1251428344 is about 35375.5331267247. The cubic root of 1251428344 is about 1077.6274920157.

Adding to 1251428344 its reverse (4438241521), we get a palindrome (5689669865).

The spelling of 1251428344 in words is "one billion, two hundred fifty-one million, four hundred twenty-eight thousand, three hundred forty-four".