12402442 has 8 divisors (see below), whose sum is σ = 20034756. Its totient is φ = 5724192.

The previous prime is 12402431. The next prime is 12402457. The reversal of 12402442 is 24420421.

It can be written as a sum of positive squares in 2 ways, for example, as 11082241 + 1320201 = 3329^2 + 1149^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238483 + ... + 238534.

Almost surely, 2^12402442 is an apocalyptic number.

12402442 is a deficient number, since it is larger than the sum of its proper divisors (7632314).

12402442 is a wasteful number, since it uses less digits than its factorization.

12402442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477032.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 12402442 is about 3521.7100959619. The cubic root of 12402442 is about 231.4740986125.

Adding to 12402442 its reverse (24420421), we get a palindrome (36822863).

The spelling of 12402442 in words is "twelve million, four hundred two thousand, four hundred forty-two".