84248421 has 8 divisors (see below), whose sum is σ = 115954944. Its totient is φ = 54353760.

The previous prime is 84248419. The next prime is 84248431. The reversal of 84248421 is 12484248.

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

It is not a de Polignac number, because 84248421 - 2¹ = 84248419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84248431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452856 + ... + 453041.

It is an arithmetic number, because the mean of its divisors is an integer number (14494368).

Almost surely, 2^84248421 is an apocalyptic number.

It is an amenable number.

84248421 is a deficient number, since it is larger than the sum of its proper divisors (31706523).

84248421 is a wasteful number, since it uses less digits than its factorization.

84248421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905931.

The product of its digits is 16384, while the sum is 33.

The square root of 84248421 is about 9178.6938613291. The cubic root of 84248421 is about 438.3832210404.

The spelling of 84248421 in words is "eighty-four million, two hundred forty-eight thousand, four hundred twenty-one".