421515005 has 8 divisors (see below), whose sum is σ = 506001624. Its totient is φ = 337089600.

The previous prime is 421514999. The next prime is 421515041. The reversal of 421515005 is 500515124.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 117570649 + 303944356 = 10843^2 + 17434^2 .

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

It is not a de Polignac number, because 421515005 - 2²⁰ = 420466429 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 7 ways as a sum of consecutive naturals, for example, 1535 + ... + 29075.

It is an arithmetic number, because the mean of its divisors is an integer number (63250203).

Almost surely, 2^421515005 is an apocalyptic number.

It is an amenable number.

421515005 is a deficient number, since it is larger than the sum of its proper divisors (84486619).

421515005 is a wasteful number, since it uses less digits than its factorization.

421515005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30607.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 421515005 is about 20530.8305969340. The cubic root of 421515005 is about 749.7866089211.

The spelling of 421515005 in words is "four hundred twenty-one million, five hundred fifteen thousand, five".