12540534 has 8 divisors (see below), whose sum is σ = 25081080. Its totient is φ = 4180176.

The previous prime is 12540529. The next prime is 12540581. The reversal of 12540534 is 43504521.

It is a sphenic number, since it is the product of 3 distinct primes.

12540534 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045039 + ... + 1045050.

It is an arithmetic number, because the mean of its divisors is an integer number (3135135).

Almost surely, 2^12540534 is an apocalyptic number.

12540534 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12540534 is a wasteful number, since it uses less digits than its factorization.

12540534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090094.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 12540534 is about 3541.2616395855. The cubic root of 12540534 is about 232.3300272316.

The spelling of 12540534 in words is "twelve million, five hundred forty thousand, five hundred thirty-four".