12402143 has 4 divisors (see below), whose sum is σ = 13356168. Its totient is φ = 11448120.

The previous prime is 12402133. The next prime is 12402149. The reversal of 12402143 is 34120421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34120421 = 467 ⋅73063.

It is a cyclic number.

It is not a de Polignac number, because 12402143 - 2⁸ = 12401887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402149) 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, 476993 + ... + 477018.

It is an arithmetic number, because the mean of its divisors is an integer number (3339042).

Almost surely, 2^12402143 is an apocalyptic number.

12402143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12402143 is a deficient number, since it is larger than the sum of its proper divisors (954025).

12402143 is an equidigital number, since it uses as much as digits as its factorization.

12402143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954024.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 12402143 is about 3521.6676447388. The cubic root of 12402143 is about 231.4722384597.

Adding to 12402143 its reverse (34120421), we get a palindrome (46522564).

The spelling of 12402143 in words is "twelve million, four hundred two thousand, one hundred forty-three".