1220147 has 2 divisors, whose sum is σ = 1220148. Its totient is φ = 1220146.

The previous prime is 1220099. The next prime is 1220171. The reversal of 1220147 is 7410221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220147 - 2⁸ = 1219891 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1220347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610073 + 610074.

It is an arithmetic number, because the mean of its divisors is an integer number (610074).

2^1220147 is an apocalyptic number.

1220147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220147 is an equidigital number, since it uses as much as digits as its factorization.

1220147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1220147 is about 1104.6026434877. The cubic root of 1220147 is about 106.8572644783.

Adding to 1220147 its reverse (7410221), we get a palindrome (8630368).

The spelling of 1220147 in words is "one million, two hundred twenty thousand, one hundred forty-seven".