12402421434 has 80 divisors (see below), whose sum is σ = 31688932968. Its totient is φ = 3591641088.

The previous prime is 12402421397. The next prime is 12402421453. The reversal of 12402421434 is 43412420421.

12402421434 is a `hidden beast` number, since 12 + 402 + 4 + 214 + 34 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11615450625 + 786970809 = 107775^2 + 28053^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12402421398 and 12402421407.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 137407 + ... + 209010.

Almost surely, 2^12402421434 is an apocalyptic number.

12402421434 is an abundant number, since it is smaller than the sum of its proper divisors (19286511534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12402421434 is a wasteful number, since it uses less digits than its factorization.

12402421434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346461 (or 346452 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 12402421434 its reverse (43412420421), we get a palindrome (55814841855).

The spelling of 12402421434 in words is "twelve billion, four hundred two million, four hundred twenty-one thousand, four hundred thirty-four".