12399741 has 6 divisors (see below), whose sum is σ = 17910750. Its totient is φ = 8266488.

The previous prime is 12399727. The next prime is 12399763. The reversal of 12399741 is 14799321.

It can be written as a sum of positive squares in only one way, i.e., 10536516 + 1863225 = 3246^2 + 1365^2 .

It is not a de Polignac number, because 12399741 - 2⁶ = 12399677 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12399696 and 12399705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12399041) 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, 688866 + ... + 688883.

It is an arithmetic number, because the mean of its divisors is an integer number (2985125).

Almost surely, 2^12399741 is an apocalyptic number.

It is an amenable number.

12399741 is a deficient number, since it is larger than the sum of its proper divisors (5511009).

12399741 is a wasteful number, since it uses less digits than its factorization.

12399741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377755 (or 1377752 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 12399741 is about 3521.3265966110. The cubic root of 12399741 is about 231.4572939398.

The spelling of 12399741 in words is "twelve million, three hundred ninety-nine thousand, seven hundred forty-one".