421585513 has 4 divisors (see below), whose sum is σ = 425453380. Its totient is φ = 417717648.

The previous prime is 421585501. The next prime is 421585519. The reversal of 421585513 is 315585124.

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 380523049 + 41062464 = 19507^2 + 6408^2 .

It is not a de Polignac number, because 421585513 - 2²¹ = 419488361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421585519) 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, 1933770 + ... + 1933987.

It is an arithmetic number, because the mean of its divisors is an integer number (106363345).

Almost surely, 2^421585513 is an apocalyptic number.

It is an amenable number.

421585513 is a deficient number, since it is larger than the sum of its proper divisors (3867867).

421585513 is a wasteful number, since it uses less digits than its factorization.

421585513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867866.

The product of its digits is 24000, while the sum is 34.

The square root of 421585513 is about 20532.5476500117. The cubic root of 421585513 is about 749.8284128950.

The spelling of 421585513 in words is "four hundred twenty-one million, five hundred eighty-five thousand, five hundred thirteen".