12543770 has 8 divisors (see below), whose sum is σ = 22578804. Its totient is φ = 5017504.

The previous prime is 12543767. The next prime is 12543779. The reversal of 12543770 is 7734521.

It can be written as a sum of positive squares in 2 ways, for example, as 12117361 + 426409 = 3481^2 + 653^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12543779) 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, 627179 + ... + 627198.

Almost surely, 2^12543770 is an apocalyptic number.

12543770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12543770 is a deficient number, since it is larger than the sum of its proper divisors (10035034).

12543770 is a wasteful number, since it uses less digits than its factorization.

12543770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254384.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 12543770 is about 3541.7185094245. The cubic root of 12543770 is about 232.3500092438.

Subtracting from 12543770 its reverse (7734521), we obtain a square (4809249 = 2193²).

The spelling of 12543770 in words is "twelve million, five hundred forty-three thousand, seven hundred seventy".