421896287 has 4 divisors (see below), whose sum is σ = 423647136. Its totient is φ = 420145440.

The previous prime is 421896283. The next prime is 421896289. The reversal of 421896287 is 782698124.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 421896287 - 2² = 421896283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421896281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875063 + ... + 875544.

It is an arithmetic number, because the mean of its divisors is an integer number (105911784).

Almost surely, 2^421896287 is an apocalyptic number.

421896287 is a deficient number, since it is larger than the sum of its proper divisors (1750849).

421896287 is a wasteful number, since it uses less digits than its factorization.

421896287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750848.

The product of its digits is 387072, while the sum is 47.

The square root of 421896287 is about 20540.1140941330. The cubic root of 421896287 is about 750.0126143064.

The spelling of 421896287 in words is "four hundred twenty-one million, eight hundred ninety-six thousand, two hundred eighty-seven".