12040397 has 4 divisors (see below), whose sum is σ = 12053340. Its totient is φ = 12027456.

The previous prime is 12040373. The next prime is 12040417. The reversal of 12040397 is 79304021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7107556 + 4932841 = 2666^2 + 2221^2 .

It is a cyclic number.

It is not a de Polignac number, because 12040397 - 2⁸ = 12040141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12040337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4958 + ... + 6975.

It is an arithmetic number, because the mean of its divisors is an integer number (3013335).

Almost surely, 2^12040397 is an apocalyptic number.

It is an amenable number.

12040397 is a deficient number, since it is larger than the sum of its proper divisors (12943).

12040397 is a wasteful number, since it uses less digits than its factorization.

12040397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12942.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 12040397 is about 3469.9275208569. The cubic root of 12040397 is about 229.1994664384.

The spelling of 12040397 in words is "twelve million, forty thousand, three hundred ninety-seven".