7421806 has 8 divisors (see below), whose sum is σ = 12723120. Its totient is φ = 3180768.

The previous prime is 7421797. The next prime is 7421807. The reversal of 7421806 is 6081247.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265051 + ... + 265078.

It is an arithmetic number, because the mean of its divisors is an integer number (1590390).

Almost surely, 2^7421806 is an apocalyptic number.

7421806 is a deficient number, since it is larger than the sum of its proper divisors (5301314).

7421806 is a wasteful number, since it uses less digits than its factorization.

7421806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530138.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 7421806 is about 2724.2991759350. The cubic root of 7421806 is about 195.0607393518.

The spelling of 7421806 in words is "seven million, four hundred twenty-one thousand, eight hundred six".