1251350220 has 48 divisors (see below), whose sum is σ = 3506162688. Its totient is φ = 333466560.

The previous prime is 1251350189. The next prime is 1251350227. The reversal of 1251350220 is 220531521.

It is not an unprimeable number, because it can be changed into a prime (1251350227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93765 + ... + 106275.

It is an arithmetic number, because the mean of its divisors is an integer number (73045056).

Almost surely, 2^1251350220 is an apocalyptic number.

1251350220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251350220 is an abundant number, since it is smaller than the sum of its proper divisors (2254812468).

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

1251350220 is a wasteful number, since it uses less digits than its factorization.

1251350220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14190 (or 14188 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1251350220 is about 35374.4288999837. The cubic root of 1251350220 is about 1077.6050668878.

Adding to 1251350220 its reverse (220531521), we get a palindrome (1471881741).

The spelling of 1251350220 in words is "one billion, two hundred fifty-one million, three hundred fifty thousand, two hundred twenty".