1223147 has 4 divisors (see below), whose sum is σ = 1232616. Its totient is φ = 1213680.

The previous prime is 1223119. The next prime is 1223149. The reversal of 1223147 is 7413221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1223147 - 2⁶ = 1223083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4538 + ... + 4799.

It is an arithmetic number, because the mean of its divisors is an integer number (308154).

2^1223147 is an apocalyptic number.

1223147 is a deficient number, since it is larger than the sum of its proper divisors (9469).

1223147 is an equidigital number, since it uses as much as digits as its factorization.

1223147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9468.

The product of its digits is 336, while the sum is 20.

The square root of 1223147 is about 1105.9597641867. The cubic root of 1223147 is about 106.9447701695.

Adding to 1223147 its reverse (7413221), we get a palindrome (8636368).

The spelling of 1223147 in words is "one million, two hundred twenty-three thousand, one hundred forty-seven".