12402542 has 8 divisors (see below), whose sum is σ = 19204032. Its totient is φ = 6001200.

The previous prime is 12402527. The next prime is 12402547. The reversal of 12402542 is 24520421.

It is a happy number.

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

12402542 is a modest number, since divided by 2542 gives 124 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12402547) 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, 99959 + ... + 100082.

It is an arithmetic number, because the mean of its divisors is an integer number (2400504).

Almost surely, 2^12402542 is an apocalyptic number.

12402542 is a deficient number, since it is larger than the sum of its proper divisors (6801490).

12402542 is a wasteful number, since it uses less digits than its factorization.

12402542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200074.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 12402542 is about 3521.7242935812. The cubic root of 12402542 is about 231.4747207305.

Adding to 12402542 its reverse (24520421), we get a palindrome (36922963).

The spelling of 12402542 in words is "twelve million, four hundred two thousand, five hundred forty-two".