12543705 has 48 divisors (see below), whose sum is σ = 24261120. Its totient is φ = 5958144.

The previous prime is 12543701. The next prime is 12543733. The reversal of 12543705 is 50734521.

It is a happy number.

It is not a de Polignac number, because 12543705 - 2² = 12543701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12543701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14104 + ... + 14966.

It is an arithmetic number, because the mean of its divisors is an integer number (505440).

Almost surely, 2^12543705 is an apocalyptic number.

12543705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12543705 is a deficient number, since it is larger than the sum of its proper divisors (11717415).

12543705 is a wasteful number, since it uses less digits than its factorization.

12543705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 907 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 12543705 is about 3541.7093330763. The cubic root of 12543705 is about 232.3496079084.

The spelling of 12543705 in words is "twelve million, five hundred forty-three thousand, seven hundred five".