1225556 has 6 divisors (see below), whose sum is σ = 2144730. Its totient is φ = 612776.

The previous prime is 1225541. The next prime is 1225559. The reversal of 1225556 is 6555221.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 80656 = 1070^2 + 284^2 .

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153191 + ... + 153198.

It is an arithmetic number, because the mean of its divisors is an integer number (357455).

2^1225556 is an apocalyptic number.

It is an amenable number.

1225556 is a deficient number, since it is larger than the sum of its proper divisors (919174).

1225556 is a wasteful number, since it uses less digits than its factorization.

1225556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306393 (or 306391 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 1225556 is about 1107.0483277617. The cubic root of 1225556 is about 107.0149337179.

The spelling of 1225556 in words is "one million, two hundred twenty-five thousand, five hundred fifty-six".