421643495 has 16 divisors (see below), whose sum is σ = 622735680. Its totient is φ = 266886144.

The previous prime is 421643479. The next prime is 421643507. The reversal of 421643495 is 594346124.

It is not a de Polignac number, because 421643495 - 2⁴ = 421643479 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 462890 + ... + 463799.

It is an arithmetic number, because the mean of its divisors is an integer number (38920980).

Almost surely, 2^421643495 is an apocalyptic number.

421643495 is a deficient number, since it is larger than the sum of its proper divisors (201092185).

421643495 is a wasteful number, since it uses less digits than its factorization.

421643495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926714.

The product of its digits is 103680, while the sum is 38.

The square root of 421643495 is about 20533.9595548447. The cubic root of 421643495 is about 749.8627867501.

The spelling of 421643495 in words is "four hundred twenty-one million, six hundred forty-three thousand, four hundred ninety-five".