1251516112 has 160 divisors (see below), whose sum is σ = 3265505280. Its totient is φ = 450024960.

The previous prime is 1251516067. The next prime is 1251516127. The reversal of 1251516112 is 2116151521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 820983 + ... + 822505.

It is an arithmetic number, because the mean of its divisors is an integer number (20409408).

Almost surely, 2^1251516112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1251516112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632752640).

1251516112 is an abundant number, since it is smaller than the sum of its proper divisors (2013989168).

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

1251516112 is a wasteful number, since it uses less digits than its factorization.

1251516112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601 (or 1595 counting only the distinct ones).

The product of its digits is 600, while the sum is 25.

The square root of 1251516112 is about 35376.7736233818. The cubic root of 1251516112 is about 1077.6526842954.

Adding to 1251516112 its reverse (2116151521), we get a palindrome (3367667633).

The spelling of 1251516112 in words is "one billion, two hundred fifty-one million, five hundred sixteen thousand, one hundred twelve".