12402142 has 8 divisors (see below), whose sum is σ = 18621216. Its totient is φ = 6195072.

The previous prime is 12402133. The next prime is 12402149. The reversal of 12402142 is 24120421.

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

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318 + ... + 4990.

It is an arithmetic number, because the mean of its divisors is an integer number (2327652).

Almost surely, 2^12402142 is an apocalyptic number.

12402142 is a deficient number, since it is larger than the sum of its proper divisors (6219074).

12402142 is a wasteful number, since it uses less digits than its factorization.

12402142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 12402142 is about 3521.6675027606. The cubic root of 12402142 is about 231.4722322384.

Adding to 12402142 its reverse (24120421), we get a palindrome (36522563).

It can be divided in two parts, 12402 and 142, that added together give a square (12544 = 112²).

The spelling of 12402142 in words is "twelve million, four hundred two thousand, one hundred forty-two".