8412421642 has 4 divisors (see below), whose sum is σ = 12618632466. Its totient is φ = 4206210820.

The previous prime is 8412421621. The next prime is 8412421657. The reversal of 8412421642 is 2461242148.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6496521201 + 1915900441 = 80601^2 + 43771^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8412421598 and 8412421607.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2103105409 + ... + 2103105412.

Almost surely, 2^8412421642 is an apocalyptic number.

8412421642 is a deficient number, since it is larger than the sum of its proper divisors (4206210824).

8412421642 is a wasteful number, since it uses less digits than its factorization.

8412421642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206210823.

The product of its digits is 24576, while the sum is 34.

The square root of 8412421642 is about 91719.2544779993. The cubic root of 8412421642 is about 2033.7942289856.

The spelling of 8412421642 in words is "eight billion, four hundred twelve million, four hundred twenty-one thousand, six hundred forty-two".