42818421 has 8 divisors (see below), whose sum is σ = 57138624. Its totient is φ = 28521920.

The previous prime is 42818407. The next prime is 42818429. The reversal of 42818421 is 12481824.

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

It is a cyclic number.

It is not a de Polignac number, because 42818421 - 2⁶ = 42818357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42818429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1161 + ... + 9326.

It is an arithmetic number, because the mean of its divisors is an integer number (7142328).

Almost surely, 2^42818421 is an apocalyptic number.

It is an amenable number.

42818421 is a deficient number, since it is larger than the sum of its proper divisors (14320203).

42818421 is a wasteful number, since it uses less digits than its factorization.

42818421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11851.

The product of its digits is 4096, while the sum is 30.

The square root of 42818421 is about 6543.5786080707. The cubic root of 42818421 is about 349.8459757660.

The spelling of 42818421 in words is "forty-two million, eight hundred eighteen thousand, four hundred twenty-one".