7421609 has 8 divisors (see below), whose sum is σ = 8413440. Its totient is φ = 6489936.

The previous prime is 7421587. The next prime is 7421633. The reversal of 7421609 is 9061247.

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 7421609 - 2¹² = 7417513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7421009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14777 + ... + 15270.

It is an arithmetic number, because the mean of its divisors is an integer number (1051680).

Almost surely, 2^7421609 is an apocalyptic number.

It is an amenable number.

7421609 is a deficient number, since it is larger than the sum of its proper divisors (991831).

7421609 is a wasteful number, since it uses less digits than its factorization.

7421609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30079.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 7421609 is about 2724.2630196073. The cubic root of 7421609 is about 195.0590134778.

The spelling of 7421609 in words is "seven million, four hundred twenty-one thousand, six hundred nine".