1251222030 has 48 divisors (see below), whose sum is σ = 3254977440. Its totient is φ = 333474624.

The previous prime is 1251222017. The next prime is 1251222073. The reversal of 1251222030 is 302221521.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1251221994 and 1251222012.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 258876 + ... + 263664.

It is an arithmetic number, because the mean of its divisors is an integer number (67812030).

Almost surely, 2^1251222030 is an apocalyptic number.

1251222030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1251222030 is an abundant number, since it is smaller than the sum of its proper divisors (2003755410).

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

1251222030 is a wasteful number, since it uses less digits than its factorization.

1251222030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7705 (or 7702 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1251222030 is about 35372.6169515347. The cubic root of 1251222030 is about 1077.5682685269.

Adding to 1251222030 its reverse (302221521), we get a palindrome (1553443551).

The spelling of 1251222030 in words is "one billion, two hundred fifty-one million, two hundred twenty-two thousand, thirty".