12138546 has 32 divisors (see below), whose sum is σ = 28643328. Its totient is φ = 3355920.

The previous prime is 12138541. The next prime is 12138551. The reversal of 12138546 is 64583121.

12138546 = T₅₈₉ + T₅₉₀ + ... + T₆₅₁.

It is an interprime number because it is at equal distance from previous prime (12138541) and next prime (12138551).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12138541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3360 + ... + 5963.

It is an arithmetic number, because the mean of its divisors is an integer number (895104).

Almost surely, 2^12138546 is an apocalyptic number.

12138546 is an abundant number, since it is smaller than the sum of its proper divisors (16504782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12138546 is a wasteful number, since it uses less digits than its factorization.

12138546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9366.

The product of its digits is 5760, while the sum is 30.

The square root of 12138546 is about 3484.0416185804. The cubic root of 12138546 is about 229.8205657851.

The spelling of 12138546 in words is "twelve million, one hundred thirty-eight thousand, five hundred forty-six".