421054406 has 4 divisors (see below), whose sum is σ = 631581612. Its totient is φ = 210527202.

The previous prime is 421054373. The next prime is 421054423. The reversal of 421054406 is 604450124.

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, 105263600 + ... + 105263603.

It is an arithmetic number, because the mean of its divisors is an integer number (157895403).

Almost surely, 2^421054406 is an apocalyptic number.

421054406 is a deficient number, since it is larger than the sum of its proper divisors (210527206).

421054406 is a wasteful number, since it uses less digits than its factorization.

421054406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210527205.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 421054406 is about 20519.6102789502. The cubic root of 421054406 is about 749.5134064446.

The spelling of 421054406 in words is "four hundred twenty-one million, fifty-four thousand, four hundred six".