1225817112 has 64 divisors (see below), whose sum is σ = 3317539680. Its totient is φ = 375201792.

The previous prime is 1225817101. The next prime is 1225817171. The reversal of 1225817112 is 2117185221.

It is a self number, because there is not a number n which added to its sum of digits gives 1225817112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50038 + ... + 70394.

Almost surely, 2^1225817112 is an apocalyptic number.

1225817112 is a gapful number since it is divisible by the number (12) 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 1225817112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1658769840).

1225817112 is an abundant number, since it is smaller than the sum of its proper divisors (2091722568).

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

1225817112 is a wasteful number, since it uses less digits than its factorization.

1225817112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20572 (or 20568 counting only the distinct ones).

The product of its digits is 2240, while the sum is 30.

The square root of 1225817112 is about 35011.6710826547. The cubic root of 1225817112 is about 1070.2253323440.

The spelling of 1225817112 in words is "one billion, two hundred twenty-five million, eight hundred seventeen thousand, one hundred twelve".