1251344464 has 10 divisors (see below), whose sum is σ = 2424479930. Its totient is φ = 625672224.

The previous prime is 1251344447. The next prime is 1251344473. The reversal of 1251344464 is 4644431521.

It can be written as a sum of positive squares in only one way, i.e., 674960400 + 576384064 = 25980^2 + 24008^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39104499 + ... + 39104530.

It is an arithmetic number, because the mean of its divisors is an integer number (242447993).

Almost surely, 2^1251344464 is an apocalyptic number.

It is an amenable number.

1251344464 is a deficient number, since it is larger than the sum of its proper divisors (1173135466).

1251344464 is an equidigital number, since it uses as much as digits as its factorization.

1251344464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78209037 (or 78209031 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The square root of 1251344464 is about 35374.3475416862. The cubic root of 1251344464 is about 1077.6034146180.

Adding to 1251344464 its reverse (4644431521), we get a palindrome (5895775985).

The spelling of 1251344464 in words is "one billion, two hundred fifty-one million, three hundred forty-four thousand, four hundred sixty-four".