1212147 has 6 divisors (see below), whose sum is σ = 1750892. Its totient is φ = 808092.

The previous prime is 1212121. The next prime is 1212149. The reversal of 1212147 is 7412121.

It is not a de Polignac number, because 1212147 - 2¹⁵ = 1179379 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212149) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67333 + ... + 67350.

2^1212147 is an apocalyptic number.

1212147 is a deficient number, since it is larger than the sum of its proper divisors (538745).

1212147 is a wasteful number, since it uses less digits than its factorization.

1212147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134689 (or 134686 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 1212147 is about 1100.9754765661. The cubic root of 1212147 is about 106.6232125517.

Adding to 1212147 its reverse (7412121), we get a palindrome (8624268).

The spelling of 1212147 in words is "one million, two hundred twelve thousand, one hundred forty-seven".