12431402 has 4 divisors (see below), whose sum is σ = 18647106. Its totient is φ = 6215700.

The previous prime is 12431399. The next prime is 12431407. The reversal of 12431402 is 20413421.

12431402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20413421 = 7 ⋅2916203.

It can be written as a sum of positive squares in only one way, i.e., 10686361 + 1745041 = 3269^2 + 1321^2 .

It is not an unprimeable number, because it can be changed into a prime (12431407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3107849 + ... + 3107852.

Almost surely, 2^12431402 is an apocalyptic number.

12431402 is a deficient number, since it is larger than the sum of its proper divisors (6215704).

12431402 is an equidigital number, since it uses as much as digits as its factorization.

12431402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215703.

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

The square root of 12431402 is about 3525.8193374023. The cubic root of 12431402 is about 231.6541244238.

Adding to 12431402 its reverse (20413421), we get a palindrome (32844823).

The spelling of 12431402 in words is "twelve million, four hundred thirty-one thousand, four hundred two".