1251215016 has 16 divisors (see below), whose sum is σ = 3128037600. Its totient is φ = 417071664.

The previous prime is 1251214997. The next prime is 1251215027. The reversal of 1251215016 is 6105121521.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 52133959 = 1251215016 / (1 + 2 + 5 + 1 + 2 + 1 + 5 + 0 + 1 + 6).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26066956 + ... + 26067003.

It is an arithmetic number, because the mean of its divisors is an integer number (195502350).

Almost surely, 2^1251215016 is an apocalyptic number.

It is an amenable number.

1251215016 is an abundant number, since it is smaller than the sum of its proper divisors (1876822584).

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

1251215016 is a wasteful number, since it uses less digits than its factorization.

1251215016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52133968 (or 52133964 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 24.

The square root of 1251215016 is about 35372.5178069077. The cubic root of 1251215016 is about 1077.5662550079.

Adding to 1251215016 its reverse (6105121521), we get a palindrome (7356336537).

The spelling of 1251215016 in words is "one billion, two hundred fifty-one million, two hundred fifteen thousand, sixteen".