1226521296 has 480 divisors, whose sum is σ = 4714364928. Its totient is φ = 287400960.

The previous prime is 1226521291. The next prime is 1226521333. The reversal of 1226521296 is 6921256221.

1226521296 is a `hidden beast` number, since 122 + 6 + 521 + 2 + 9 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1226521296.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226521291) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9657585 + ... + 9657711.

Almost surely, 2^1226521296 is an apocalyptic number.

1226521296 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1226521296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2357182464).

1226521296 is an abundant number, since it is smaller than the sum of its proper divisors (3487843632).

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

1226521296 is a wasteful number, since it uses less digits than its factorization.

1226521296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 230 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1226521296 is about 35021.7260568351. The cubic root of 1226521296 is about 1070.4302273164.

The spelling of 1226521296 in words is "one billion, two hundred twenty-six million, five hundred twenty-one thousand, two hundred ninety-six".