1226245020 has 384 divisors, whose sum is σ = 4885235712. Its totient is φ = 221184000.

The previous prime is 1226244991. The next prime is 1226245039. The reversal of 1226245020 is 205426221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 127 ways as a sum of consecutive naturals, for example, 1020420 + ... + 1021620.

It is an arithmetic number, because the mean of its divisors is an integer number (12721968).

Almost surely, 2^1226245020 is an apocalyptic number.

1226245020 is a gapful number since it is divisible by the number (10) 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 1226245020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2442617856).

1226245020 is an abundant number, since it is smaller than the sum of its proper divisors (3658990692).

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

1226245020 is a wasteful number, since it uses less digits than its factorization.

1226245020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261 (or 1259 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1226245020 is about 35017.7814831265. The cubic root of 1226245020 is about 1070.3498492069.

The spelling of 1226245020 in words is "one billion, two hundred twenty-six million, two hundred forty-five thousand, twenty".