421400289 has 8 divisors (see below), whose sum is σ = 577052800. Its totient is φ = 273340656.

The previous prime is 421400281. The next prime is 421400339. The reversal of 421400289 is 982004124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421400289 - 2³ = 421400281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421400281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1898089 + ... + 1898310.

It is an arithmetic number, because the mean of its divisors is an integer number (72131600).

Almost surely, 2^421400289 is an apocalyptic number.

It is an amenable number.

421400289 is a deficient number, since it is larger than the sum of its proper divisors (155652511).

421400289 is a wasteful number, since it uses less digits than its factorization.

421400289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796439.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 421400289 is about 20528.0366572159. The cubic root of 421400289 is about 749.7185841978.

The spelling of 421400289 in words is "four hundred twenty-one million, four hundred thousand, two hundred eighty-nine".