12019705 has 4 divisors (see below), whose sum is σ = 14423652. Its totient is φ = 9615760.

The previous prime is 12019703. The next prime is 12019729. The reversal of 12019705 is 50791021.

12019705 = 2451² + 2452².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50791021 = 571 ⋅88951.

It can be written as a sum of positive squares in 2 ways, for example, as 6012304 + 6007401 = 2452^2 + 2451^2 .

It is not a de Polignac number, because 12019705 - 2¹ = 12019703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12019705.

It is not an unprimeable number, because it can be changed into a prime (12019703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201966 + ... + 1201975.

It is an arithmetic number, because the mean of its divisors is an integer number (3605913).

Almost surely, 2^12019705 is an apocalyptic number.

12019705 is the 2452-nd centered square number.

It is an amenable number.

12019705 is a deficient number, since it is larger than the sum of its proper divisors (2403947).

12019705 is an equidigital number, since it uses as much as digits as its factorization.

12019705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403946.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 12019705 is about 3466.9446202672. The cubic root of 12019705 is about 229.0680943929.

The spelling of 12019705 in words is "twelve million, nineteen thousand, seven hundred five".