1912147 has 2 divisors, whose sum is σ = 1912148. Its totient is φ = 1912146.

The previous prime is 1912139. The next prime is 1912159. The reversal of 1912147 is 7412191.

It is a weak prime.

It is an emirp because it is prime and its reverse (7412191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1912147 - 2³ = 1912139 is a prime.

It is a super-2 number, since 2×1912147² = 7312612299218, which contains 22 as substring.

1912147 is a lucky number.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (1912847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956073 + 956074.

It is an arithmetic number, because the mean of its divisors is an integer number (956074).

2^1912147 is an apocalyptic number.

1912147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912147 is an equidigital number, since it uses as much as digits as its factorization.

1912147 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 1912147 is about 1382.8040352848. The cubic root of 1912147 is about 124.1196166246.

The spelling of 1912147 in words is "one million, nine hundred twelve thousand, one hundred forty-seven".