1226653572 has 24 divisors (see below), whose sum is σ = 2986635456. Its totient is φ = 391106848.

The previous prime is 1226653543. The next prime is 1226653579. The reversal of 1226653572 is 2753566221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1226653572.

It is not an unprimeable number, because it can be changed into a prime (1226653579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2221923 + ... + 2222474.

It is an arithmetic number, because the mean of its divisors is an integer number (124443144).

Almost surely, 2^1226653572 is an apocalyptic number.

1226653572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1226653572 is an abundant number, since it is smaller than the sum of its proper divisors (1759981884).

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

1226653572 is a wasteful number, since it uses less digits than its factorization.

1226653572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444427 (or 4444425 counting only the distinct ones).

The product of its digits is 151200, while the sum is 39.

The square root of 1226653572 is about 35023.6144907975. The cubic root of 1226653572 is about 1070.4687066426.

The spelling of 1226653572 in words is "one billion, two hundred twenty-six million, six hundred fifty-three thousand, five hundred seventy-two".