1225650864 has 80 divisors (see below), whose sum is σ = 3366427392. Its totient is φ = 383395584.

The previous prime is 1225650787. The next prime is 1225650883. The reversal of 1225650864 is 4680565221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48039 + ... + 68985.

Almost surely, 2^1225650864 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 1225650864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1683213696).

1225650864 is an abundant number, since it is smaller than the sum of its proper divisors (2140776528).

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

1225650864 is a wasteful number, since it uses less digits than its factorization.

1225650864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21034 (or 21028 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 1225650864 is about 35009.2968224156. The cubic root of 1225650864 is about 1070.1769480558.

The spelling of 1225650864 in words is "one billion, two hundred twenty-five million, six hundred fifty thousand, eight hundred sixty-four".