12143481 has 16 divisors (see below), whose sum is σ = 18729984. Its totient is φ = 6854544.

The previous prime is 12143473. The next prime is 12143497. The reversal of 12143481 is 18434121.

It is not a de Polignac number, because 12143481 - 2³ = 12143473 is a prime.

It is a super-2 number, since 2×12143481² = 294928261594722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12143441) 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, 1741 + ... + 5226.

It is an arithmetic number, because the mean of its divisors is an integer number (1170624).

Almost surely, 2^12143481 is an apocalyptic number.

It is an amenable number.

12143481 is a deficient number, since it is larger than the sum of its proper divisors (6586503).

12143481 is an equidigital number, since it uses as much as digits as its factorization.

12143481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7060.

The product of its digits is 768, while the sum is 24.

The square root of 12143481 is about 3484.7497758089. The cubic root of 12143481 is about 229.8517065501.

The spelling of 12143481 in words is "twelve million, one hundred forty-three thousand, four hundred eighty-one".