1221548282 has 8 divisors (see below), whose sum is σ = 1832837952. Its totient is φ = 610602300.

The previous prime is 1221548281. The next prime is 1221548287. The reversal of 1221548282 is 2828451221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1221548281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76844 + ... + 91367.

It is an arithmetic number, because the mean of its divisors is an integer number (229104744).

Almost surely, 2^1221548282 is an apocalyptic number.

1221548282 is a deficient number, since it is larger than the sum of its proper divisors (611289670).

1221548282 is a wasteful number, since it uses less digits than its factorization.

1221548282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171844.

The product of its digits is 20480, while the sum is 35.

The square root of 1221548282 is about 34950.6549580977. The cubic root of 1221548282 is about 1068.9815569220.

The spelling of 1221548282 in words is "one billion, two hundred twenty-one million, five hundred forty-eight thousand, two hundred eighty-two".