12543922 has 4 divisors (see below), whose sum is σ = 18815886. Its totient is φ = 6271960.

The previous prime is 12543919. The next prime is 12543929. The reversal of 12543922 is 22934521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22934521 = 4789².

It can be written as a sum of positive squares in only one way, i.e., 11082241 + 1461681 = 3329^2 + 1209^2 .

It is not an unprimeable number, because it can be changed into a prime (12543929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3135979 + ... + 3135982.

Almost surely, 2^12543922 is an apocalyptic number.

12543922 is a deficient number, since it is larger than the sum of its proper divisors (6271964).

12543922 is an equidigital number, since it uses as much as digits as its factorization.

12543922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6271963.

The product of its digits is 4320, while the sum is 28.

The square root of 12543922 is about 3541.7399678689. The cubic root of 12543922 is about 232.3509477458.

The spelling of 12543922 in words is "twelve million, five hundred forty-three thousand, nine hundred twenty-two".