1221846272 has 18 divisors (see below), whose sum is σ = 2438920218. Its totient is φ = 610923008.

The previous prime is 1221846271. The next prime is 1221846293. The reversal of 1221846272 is 2726481221.

It can be written as a sum of positive squares in only one way, i.e., 1193287936 + 28558336 = 34544^2 + 5344^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221846271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2386163 + ... + 2386674.

Almost surely, 2^1221846272 is an apocalyptic number.

It is an amenable number.

1221846272 is a deficient number, since it is larger than the sum of its proper divisors (1217073946).

1221846272 is an frugal number, since it uses more digits than its factorization.

1221846272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772853 (or 4772839 counting only the distinct ones).

The product of its digits is 21504, while the sum is 35.

The square root of 1221846272 is about 34954.9177083855. The cubic root of 1221846272 is about 1069.0684739163.

The spelling of 1221846272 in words is "one billion, two hundred twenty-one million, eight hundred forty-six thousand, two hundred seventy-two".