1222651250 has 90 divisors (see below), whose sum is σ = 2452720347. Its totient is φ = 456918000.

The previous prime is 1222651249. The next prime is 1222651259. The reversal of 1222651250 is 521562221.

It can be written as a sum of positive squares in 3 ways, for example, as 282676969 + 939974281 = 16813^2 + 30659^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24725.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222651259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 28433729 + ... + 28433771.

Almost surely, 2^1222651250 is an apocalyptic number.

1222651250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1222651250 is an abundant number, since it is smaller than the sum of its proper divisors (1230069097).

1222651250 is an frugal number, since it uses more digits than its factorization.

1222651250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1222651250 is about 34966.4303296748. The cubic root of 1222651250 is about 1069.3031973023.

The spelling of 1222651250 in words is "one billion, two hundred twenty-two million, six hundred fifty-one thousand, two hundred fifty".