1219147 has 2 divisors, whose sum is σ = 1219148. Its totient is φ = 1219146.

The previous prime is 1219129. The next prime is 1219177. The reversal of 1219147 is 7419121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1219147 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1219177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609573 + 609574.

It is an arithmetic number, because the mean of its divisors is an integer number (609574).

2^1219147 is an apocalyptic number.

1219147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219147 is an equidigital number, since it uses as much as digits as its factorization.

1219147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 25.

The square root of 1219147 is about 1104.1498992438. The cubic root of 1219147 is about 106.8280640431.

The spelling of 1219147 in words is "one million, two hundred nineteen thousand, one hundred forty-seven".