1221362704 has 15 divisors (see below), whose sum is σ = 2366661117. Its totient is φ = 610611456.

The previous prime is 1221362689. The next prime is 1221362713. The reversal of 1221362704 is 4072631221.

The square root of 1221362704 is 34948.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 462250000 + 759112704 = 21500^2 + 27552^2 .

It is a super-3 number, since 3×1221362704³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 135424 + ... + 144160.

Almost surely, 2^1221362704 is an apocalyptic number.

1221362704 is the 34948-th square number.

It is an amenable number.

1221362704 is a deficient number, since it is larger than the sum of its proper divisors (1145298413).

1221362704 is an frugal number, since it uses more digits than its factorization.

1221362704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17482 (or 8739 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The cubic root of 1221362704 is about 1068.9274208421.

Adding to 1221362704 its reverse (4072631221), we get a palindrome (5293993925).

The spelling of 1221362704 in words is "one billion, two hundred twenty-one million, three hundred sixty-two thousand, seven hundred four".