1225541356 has 72 divisors (see below), whose sum is σ = 2512399680. Its totient is φ = 520805376.

The previous prime is 1225541353. The next prime is 1225541371. The reversal of 1225541356 is 6531455221.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (1225541353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 538990 + ... + 541258.

It is an arithmetic number, because the mean of its divisors is an integer number (34894440).

Almost surely, 2^1225541356 is an apocalyptic number.

It is an amenable number.

1225541356 is an abundant number, since it is smaller than the sum of its proper divisors (1286858324).

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

1225541356 is a wasteful number, since it uses less digits than its factorization.

1225541356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363 (or 2348 counting only the distinct ones).

The product of its digits is 36000, while the sum is 34.

The square root of 1225541356 is about 35007.7328029108. The cubic root of 1225541356 is about 1070.1450748063.

Adding to 1225541356 its reverse (6531455221), we get a palindrome (7756996577).

The spelling of 1225541356 in words is "one billion, two hundred twenty-five million, five hundred forty-one thousand, three hundred fifty-six".