12550397 has 4 divisors (see below), whose sum is σ = 12571356. Its totient is φ = 12529440.

The previous prime is 12550357. The next prime is 12550411. The reversal of 12550397 is 79305521.

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 3345241 + 9205156 = 1829^2 + 3034^2 .

It is a cyclic number.

It is not a de Polignac number, because 12550397 - 2¹² = 12546301 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 (12550337) 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, 9554 + ... + 10787.

It is an arithmetic number, because the mean of its divisors is an integer number (3142839).

Almost surely, 2^12550397 is an apocalyptic number.

It is an amenable number.

12550397 is a deficient number, since it is larger than the sum of its proper divisors (20959).

12550397 is an equidigital number, since it uses as much as digits as its factorization.

12550397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20958.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 12550397 is about 3542.6539486662. The cubic root of 12550397 is about 232.3909196567.

The spelling of 12550397 in words is "twelve million, five hundred fifty thousand, three hundred ninety-seven".