42256406 has 4 divisors (see below), whose sum is σ = 63384612. Its totient is φ = 21128202.

The previous prime is 42256397. The next prime is 42256421. The reversal of 42256406 is 60465224.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 10564100 + ... + 10564103.

It is an arithmetic number, because the mean of its divisors is an integer number (15846153).

Almost surely, 2^42256406 is an apocalyptic number.

42256406 is a deficient number, since it is larger than the sum of its proper divisors (21128206).

42256406 is a wasteful number, since it uses less digits than its factorization.

42256406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21128205.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 42256406 is about 6500.4927505536. The cubic root of 42256406 is about 348.3085902822.

The spelling of 42256406 in words is "forty-two million, two hundred fifty-six thousand, four hundred six".