8421747 has 8 divisors (see below), whose sum is σ = 11251920. Its totient is φ = 5603040.

The previous prime is 8421737. The next prime is 8421757. The reversal of 8421747 is 7471248.

It is an interprime number because it is at equal distance from previous prime (8421737) and next prime (8421757).

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

It is not a de Polignac number, because 8421747 - 2⁷ = 8421619 is a prime.

It is a d-powerful number, because it can be written as 8⁵ + 4² + 2²³ + 1 + 7² + 4⁴ + 7² .

It is not an unprimeable number, because it can be changed into a prime (8421727) 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, 972 + ... + 4217.

It is an arithmetic number, because the mean of its divisors is an integer number (1406490).

Almost surely, 2^8421747 is an apocalyptic number.

8421747 is a deficient number, since it is larger than the sum of its proper divisors (2830173).

8421747 is a wasteful number, since it uses less digits than its factorization.

8421747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5733.

The product of its digits is 12544, while the sum is 33.

The square root of 8421747 is about 2902.0246380760. The cubic root of 8421747 is about 203.4545453638.

The spelling of 8421747 in words is "eight million, four hundred twenty-one thousand, seven hundred forty-seven".