1251515152 has 20 divisors (see below), whose sum is σ = 2452058460. Its totient is φ = 618725888.

The previous prime is 1251515149. The next prime is 1251515183. The reversal of 1251515152 is 2515151521.

It can be written as a sum of positive squares in 2 ways, for example, as 730945296 + 520569856 = 27036^2 + 22816^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1251515152.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438013 + ... + 440860.

It is an arithmetic number, because the mean of its divisors is an integer number (122602923).

Almost surely, 2^1251515152 is an apocalyptic number.

It is an amenable number.

1251515152 is a deficient number, since it is larger than the sum of its proper divisors (1200543308).

1251515152 is an equidigital number, since it uses as much as digits as its factorization.

1251515152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878970 (or 878964 counting only the distinct ones).

The product of its digits is 2500, while the sum is 28.

The square root of 1251515152 is about 35376.7600551549. The cubic root of 1251515152 is about 1077.6524087505.

Adding to 1251515152 its reverse (2515151521), we get a palindrome (3766666673).

The spelling of 1251515152 in words is "one billion, two hundred fifty-one million, five hundred fifteen thousand, one hundred fifty-two".