421470685 has 4 divisors (see below), whose sum is σ = 505764828. Its totient is φ = 337176544.

The previous prime is 421470661. The next prime is 421470701. The reversal of 421470685 is 586074124.

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

It can be written as a sum of positive squares in 2 ways, for example, as 199430884 + 222039801 = 14122^2 + 14901^2 .

It is a cyclic number.

It is not a de Polignac number, because 421470685 - 2⁷ = 421470557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42147064 + ... + 42147073.

It is an arithmetic number, because the mean of its divisors is an integer number (126441207).

Almost surely, 2^421470685 is an apocalyptic number.

It is an amenable number.

421470685 is a deficient number, since it is larger than the sum of its proper divisors (84294143).

421470685 is an equidigital number, since it uses as much as digits as its factorization.

421470685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84294142.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 421470685 is about 20529.7512162228. The cubic root of 421470685 is about 749.7603293447.

The spelling of 421470685 in words is "four hundred twenty-one million, four hundred seventy thousand, six hundred eighty-five".