421515505 has 16 divisors (see below), whose sum is σ = 523678464. Its totient is φ = 325503360.

The previous prime is 421515469. The next prime is 421515533. The reversal of 421515505 is 505515124.

It is not a de Polignac number, because 421515505 - 2⁹ = 421514993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4870 + ... + 29440.

It is an arithmetic number, because the mean of its divisors is an integer number (32729904).

Almost surely, 2^421515505 is an apocalyptic number.

It is an amenable number.

421515505 is a deficient number, since it is larger than the sum of its proper divisors (102162959).

421515505 is a wasteful number, since it uses less digits than its factorization.

421515505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24696.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 421515505 is about 20530.8427737392. The cubic root of 421515505 is about 749.7869053859.

The spelling of 421515505 in words is "four hundred twenty-one million, five hundred fifteen thousand, five hundred five".