1221744934 has 16 divisors (see below), whose sum is σ = 1842001920. Its totient is φ = 607750920.

The previous prime is 1221744929. The next prime is 1221744941. The reversal of 1221744934 is 4394471221.

It is a junction number, because it is equal to n+sod(n) for n = 1221744893 and 1221744902.

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 7 ways as a sum of consecutive naturals, for example, 772957 + ... + 774535.

It is an arithmetic number, because the mean of its divisors is an integer number (115125120).

Almost surely, 2^1221744934 is an apocalyptic number.

1221744934 is a deficient number, since it is larger than the sum of its proper divisors (620256986).

1221744934 is a wasteful number, since it uses less digits than its factorization.

1221744934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315.

The product of its digits is 48384, while the sum is 37.

The square root of 1221744934 is about 34953.4681254951. The cubic root of 1221744934 is about 1069.0389174822.

The spelling of 1221744934 in words is "one billion, two hundred twenty-one million, seven hundred forty-four thousand, nine hundred thirty-four".