12540199 has 4 divisors (see below), whose sum is σ = 14331664. Its totient is φ = 10748736.

The previous prime is 12540181. The next prime is 12540217. The reversal of 12540199 is 99104521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99104521 = 4019 ⋅24659.

It is an interprime number because it is at equal distance from previous prime (12540181) and next prime (12540217).

It is a cyclic number.

It is not a de Polignac number, because 12540199 - 2⁵ = 12540167 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 12540199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540109) 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, 895722 + ... + 895735.

It is an arithmetic number, because the mean of its divisors is an integer number (3582916).

Almost surely, 2^12540199 is an apocalyptic number.

12540199 is a deficient number, since it is larger than the sum of its proper divisors (1791465).

12540199 is an equidigital number, since it uses as much as digits as its factorization.

12540199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791464.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 12540199 is about 3541.2143397428. The cubic root of 12540199 is about 232.3279584401.

The spelling of 12540199 in words is "twelve million, five hundred forty thousand, one hundred ninety-nine".