1225944672 has 48 divisors (see below), whose sum is σ = 3220197120. Its totient is φ = 408382592.

The previous prime is 1225944641. The next prime is 1225944677. The reversal of 1225944672 is 2764495221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225944677) 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, 192613 + ... + 198875.

It is an arithmetic number, because the mean of its divisors is an integer number (67087440).

Almost surely, 2^1225944672 is an apocalyptic number.

1225944672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1225944672 is an abundant number, since it is smaller than the sum of its proper divisors (1994252448).

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

1225944672 is a wasteful number, since it uses less digits than its factorization.

1225944672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8315 (or 8307 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 1225944672 is about 35013.4927135240. The cubic root of 1225944672 is about 1070.2624540339.

The spelling of 1225944672 in words is "one billion, two hundred twenty-five million, nine hundred forty-four thousand, six hundred seventy-two".