1221630734 has 8 divisors (see below), whose sum is σ = 1836210288. Its totient is φ = 609560640.

The previous prime is 1221630719. The next prime is 1221630797. The reversal of 1221630734 is 4370361221.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1221630697 and 1221630706.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 626147 + ... + 628094.

It is an arithmetic number, because the mean of its divisors is an integer number (229526286).

Almost surely, 2^1221630734 is an apocalyptic number.

1221630734 is a deficient number, since it is larger than the sum of its proper divisors (614579554).

1221630734 is a wasteful number, since it uses less digits than its factorization.

1221630734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254730.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 1221630734 is about 34951.8344869050. The cubic root of 1221630734 is about 1069.0056077340.

Adding to 1221630734 its reverse (4370361221), we get a palindrome (5591991955).

The spelling of 1221630734 in words is "one billion, two hundred twenty-one million, six hundred thirty thousand, seven hundred thirty-four".