1220272247 has 8 divisors (see below), whose sum is σ = 1253724576. Its totient is φ = 1186844832.

The previous prime is 1220272231. The next prime is 1220272253. The reversal of 1220272247 is 7422720221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220272247 - 2⁴ = 1220272231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220272297) 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, 138053 + ... + 146625.

It is an arithmetic number, because the mean of its divisors is an integer number (156715572).

Almost surely, 2^1220272247 is an apocalyptic number.

1220272247 is a deficient number, since it is larger than the sum of its proper divisors (33452329).

1220272247 is an equidigital number, since it uses as much as digits as its factorization.

1220272247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12457.

The product of its (nonzero) digits is 6272, while the sum is 29.

The square root of 1220272247 is about 34932.3953802198. The cubic root of 1220272247 is about 1068.6092062083.

Adding to 1220272247 its reverse (7422720221), we get a palindrome (8642992468).

The spelling of 1220272247 in words is "one billion, two hundred twenty million, two hundred seventy-two thousand, two hundred forty-seven".