42421406 has 4 divisors (see below), whose sum is σ = 63632112. Its totient is φ = 21210702.

The previous prime is 42421399. The next prime is 42421411. The reversal of 42421406 is 60412424.

42421406 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605350 + ... + 10605353.

It is an arithmetic number, because the mean of its divisors is an integer number (15908028).

Almost surely, 2^42421406 is an apocalyptic number.

42421406 is a deficient number, since it is larger than the sum of its proper divisors (21210706).

42421406 is a wasteful number, since it uses less digits than its factorization.

42421406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21210705.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 42421406 is about 6513.1717311921. The cubic root of 42421406 is about 348.7613522167.

The spelling of 42421406 in words is "forty-two million, four hundred twenty-one thousand, four hundred six".