1225960644 has 24 divisors (see below), whose sum is σ = 3028844448. Its totient is φ = 384615040.

The previous prime is 1225960609. The next prime is 1225960657. The reversal of 1225960644 is 4460695221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3004602 + ... + 3005009.

It is an arithmetic number, because the mean of its divisors is an integer number (126201852).

Almost surely, 2^1225960644 is an apocalyptic number.

It is an amenable number.

1225960644 is an abundant number, since it is smaller than the sum of its proper divisors (1802883804).

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

1225960644 is a wasteful number, since it uses less digits than its factorization.

1225960644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6009635 (or 6009633 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 1225960644 is about 35013.7207962821. The cubic root of 1225960644 is about 1070.2671019211.

The spelling of 1225960644 in words is "one billion, two hundred twenty-five million, nine hundred sixty thousand, six hundred forty-four".