1225056 has 48 divisors (see below), whose sum is σ = 3677184. Its totient is φ = 349824.

The previous prime is 1225019. The next prime is 1225061. The reversal of 1225056 is 6505221.

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

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent 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, 240 + ... + 1583.

It is an arithmetic number, because the mean of its divisors is an integer number (76608).

2^1225056 is an apocalyptic number.

1225056 is a gapful number since it is divisible by the number (16) 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 1225056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1838592).

1225056 is an abundant number, since it is smaller than the sum of its proper divisors (2452128).

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

1225056 is a wasteful number, since it uses less digits than its factorization.

1225056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1225056 is about 1106.8224789911. The cubic root of 1225056 is about 107.0003784888. Note that the first 3 decimals are identical.

The spelling of 1225056 in words is "one million, two hundred twenty-five thousand, fifty-six".