7879421 has 8 divisors (see below), whose sum is σ = 8805888. Its totient is φ = 6988000.

The previous prime is 7879411. The next prime is 7879423. The reversal of 7879421 is 1249787.

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

It is a cyclic number.

It is not a de Polignac number, because 7879421 - 2¹⁸ = 7617277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7879423) 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, 8285 + ... + 9186.

It is an arithmetic number, because the mean of its divisors is an integer number (1100736).

Almost surely, 2^7879421 is an apocalyptic number.

It is an amenable number.

7879421 is a deficient number, since it is larger than the sum of its proper divisors (926467).

7879421 is a wasteful number, since it uses less digits than its factorization.

7879421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17523.

The product of its digits is 28224, while the sum is 38.

The square root of 7879421 is about 2807.0306375243. The cubic root of 7879421 is about 198.9900839314.

The spelling of 7879421 in words is "seven million, eight hundred seventy-nine thousand, four hundred twenty-one".