1206147 has 4 divisors (see below), whose sum is σ = 1608200. Its totient is φ = 804096.

The previous prime is 1206131. The next prime is 1206151. The reversal of 1206147 is 7416021.

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

It is not a de Polignac number, because 1206147 - 2⁴ = 1206131 is a prime.

It is a D-number.

It is a Duffinian number.

1206147 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1206157) 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, 201022 + ... + 201027.

It is an arithmetic number, because the mean of its divisors is an integer number (402050).

2^1206147 is an apocalyptic number.

1206147 is a deficient number, since it is larger than the sum of its proper divisors (402053).

1206147 is an equidigital number, since it uses as much as digits as its factorization.

1206147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402052.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 1206147 is about 1098.2472399237. The cubic root of 1206147 is about 106.4469969236.

The spelling of 1206147 in words is "one million, two hundred six thousand, one hundred forty-seven".