1226397172 has 72 divisors (see below), whose sum is σ = 2897560512. Its totient is φ = 441043200.

The previous prime is 1226397149. The next prime is 1226397203. The reversal of 1226397172 is 2717936221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40272 + ... + 63832.

It is an arithmetic number, because the mean of its divisors is an integer number (40243896).

Almost surely, 2^1226397172 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 1226397172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448780256).

1226397172 is an abundant number, since it is smaller than the sum of its proper divisors (1671163340).

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

1226397172 is a wasteful number, since it uses less digits than its factorization.

1226397172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23609 (or 23594 counting only the distinct ones).

The product of its digits is 63504, while the sum is 40.

The square root of 1226397172 is about 35019.9539120199. The cubic root of 1226397172 is about 1070.3941169055.

The spelling of 1226397172 in words is "one billion, two hundred twenty-six million, three hundred ninety-seven thousand, one hundred seventy-two".