1225655356 has 24 divisors (see below), whose sum is σ = 2177199360. Its totient is φ = 603642672.

The previous prime is 1225655279. The next prime is 1225655357. The reversal of 1225655356 is 6535565221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225655357) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 109885 + ... + 120523.

It is an arithmetic number, because the mean of its divisors is an integer number (90716640).

Almost surely, 2^1225655356 is an apocalyptic number.

It is an amenable number.

1225655356 is a deficient number, since it is larger than the sum of its proper divisors (951544004).

1225655356 is a wasteful number, since it uses less digits than its factorization.

1225655356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11073 (or 11071 counting only the distinct ones).

The product of its digits is 270000, while the sum is 40.

The square root of 1225655356 is about 35009.3609767445. The cubic root of 1225655356 is about 1070.1782554507.

The spelling of 1225655356 in words is "one billion, two hundred twenty-five million, six hundred fifty-five thousand, three hundred fifty-six".