1251116330 has 8 divisors (see below), whose sum is σ = 2252009412. Its totient is φ = 500446528.

The previous prime is 1251116329. The next prime is 1251116333. The reversal of 1251116330 is 336111521.

It can be written as a sum of positive squares in 2 ways, for example, as 1199721769 + 51394561 = 34637^2 + 7169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1251116296 and 1251116305.

It is not an unprimeable number, because it can be changed into a prime (1251116333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62555807 + ... + 62555826.

Almost surely, 2^1251116330 is an apocalyptic number.

1251116330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251116330 is a deficient number, since it is larger than the sum of its proper divisors (1000893082).

1251116330 is a wasteful number, since it uses less digits than its factorization.

1251116330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125111640.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1251116330 is about 35371.1228263961. The cubic root of 1251116330 is about 1077.5379242793.

Adding to 1251116330 its reverse (336111521), we get a palindrome (1587227851).

The spelling of 1251116330 in words is "one billion, two hundred fifty-one million, one hundred sixteen thousand, three hundred thirty".