1221047274 has 16 divisors (see below), whose sum is σ = 2570626080. Its totient is φ = 385593840.

The previous prime is 1221047273. The next prime is 1221047297. The reversal of 1221047274 is 4727401221.

It is not an unprimeable number, because it can be changed into a prime (1221047273) 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 7 ways as a sum of consecutive naturals, for example, 5355357 + ... + 5355584.

It is an arithmetic number, because the mean of its divisors is an integer number (160664130).

Almost surely, 2^1221047274 is an apocalyptic number.

1221047274 is an abundant number, since it is smaller than the sum of its proper divisors (1349578806).

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

1221047274 is a wasteful number, since it uses less digits than its factorization.

1221047274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10710965.

The product of its (nonzero) digits is 6272, while the sum is 30.

The square root of 1221047274 is about 34943.4868609302. The cubic root of 1221047274 is about 1068.8353922674.

Adding to 1221047274 its reverse (4727401221), we get a palindrome (5948448495).

The spelling of 1221047274 in words is "one billion, two hundred twenty-one million, forty-seven thousand, two hundred seventy-four".