8972421 has 8 divisors (see below), whose sum is σ = 11985600. Its totient is φ = 5970432.

The previous prime is 8972407. The next prime is 8972459. The reversal of 8972421 is 1242798.

It is a happy number.

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

It is not a de Polignac number, because 8972421 - 2¹⁰ = 8971397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8972221) 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, 700 + ... + 4293.

It is an arithmetic number, because the mean of its divisors is an integer number (1498200).

Almost surely, 2^8972421 is an apocalyptic number.

It is an amenable number.

8972421 is a deficient number, since it is larger than the sum of its proper divisors (3013179).

8972421 is a wasteful number, since it uses less digits than its factorization.

8972421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5595.

The product of its digits is 8064, while the sum is 33.

The square root of 8972421 is about 2995.3999732924. The cubic root of 8972421 is about 207.7956959032.

The spelling of 8972421 in words is "eight million, nine hundred seventy-two thousand, four hundred twenty-one".