421550415 has 96 divisors (see below), whose sum is σ = 867746880. Its totient is φ = 186624000.

The previous prime is 421550401. The next prime is 421550429. The reversal of 421550415 is 514055124.

It is an interprime number because it is at equal distance from previous prime (421550401) and next prime (421550429).

It is not a de Polignac number, because 421550415 - 2¹⁵ = 421517647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 701115 + ... + 701715.

It is an arithmetic number, because the mean of its divisors is an integer number (9039030).

Almost surely, 2^421550415 is an apocalyptic number.

421550415 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421550415 is an abundant number, since it is smaller than the sum of its proper divisors (446196465).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421550415 is a wasteful number, since it uses less digits than its factorization.

421550415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 421550415 is about 20531.6929404275. The cubic root of 421550415 is about 749.8076039826.

The spelling of 421550415 in words is "four hundred twenty-one million, five hundred fifty thousand, four hundred fifteen".