1222251264 has 324 divisors, whose sum is σ = 3958218264. Its totient is φ = 362299392.

The previous prime is 1222251241. The next prime is 1222251271. The reversal of 1222251264 is 4621522221.

1222251264 is a `hidden beast` number, since 122 + 22 + 512 + 6 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16743132 + ... + 16743204.

Almost surely, 2^1222251264 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 1222251264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1979109132).

1222251264 is an abundant number, since it is smaller than the sum of its proper divisors (2735967000).

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

1222251264 is a wasteful number, since it uses less digits than its factorization.

1222251264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 134 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 1222251264 is about 34960.7102902673. The cubic root of 1222251264 is about 1069.1865783406.

Adding to 1222251264 its reverse (4621522221), we get a palindrome (5843773485).

The spelling of 1222251264 in words is "one billion, two hundred twenty-two million, two hundred fifty-one thousand, two hundred sixty-four".