12001949 has 8 divisors (see below), whose sum is σ = 13052088. Its totient is φ = 10990080.

The previous prime is 12001943. The next prime is 12001961. The reversal of 12001949 is 94910021.

It can be written as a sum of positive squares in 4 ways, for example, as 3678724 + 8323225 = 1918^2 + 2885^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8912 + ... + 10169.

It is an arithmetic number, because the mean of its divisors is an integer number (1631511).

Almost surely, 2^12001949 is an apocalyptic number.

It is an amenable number.

12001949 is a deficient number, since it is larger than the sum of its proper divisors (1050139).

12001949 is a wasteful number, since it uses less digits than its factorization.

12001949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19135.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12001949 is about 3464.3829176348. The cubic root of 12001949 is about 228.9552425511.

The spelling of 12001949 in words is "twelve million, one thousand, nine hundred forty-nine".