12543390 has 32 divisors (see below), whose sum is σ = 33449760. Its totient is φ = 3344832.

The previous prime is 12543379. The next prime is 12543397. The reversal of 12543390 is 9334521.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12543397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22959 + ... + 23498.

It is an arithmetic number, because the mean of its divisors is an integer number (1045305).

Almost surely, 2^12543390 is an apocalyptic number.

12543390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12543390 is an abundant number, since it is smaller than the sum of its proper divisors (20906370).

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

12543390 is a wasteful number, since it uses less digits than its factorization.

12543390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46473 (or 46467 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 12543390 is about 3541.6648627446. The cubic root of 12543390 is about 232.3476629557.

The spelling of 12543390 in words is "twelve million, five hundred forty-three thousand, three hundred ninety".