7617421 has 8 divisors (see below), whose sum is σ = 8804160. Its totient is φ = 6455328.

The previous prime is 7617419. The next prime is 7617427. The reversal of 7617421 is 1247167.

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 7617421 - 2¹ = 7617419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7617421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7617427) 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, 5491 + ... + 6736.

It is an arithmetic number, because the mean of its divisors is an integer number (1100520).

Almost surely, 2^7617421 is an apocalyptic number.

It is an amenable number.

7617421 is a deficient number, since it is larger than the sum of its proper divisors (1186739).

7617421 is a wasteful number, since it uses less digits than its factorization.

7617421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12323.

The product of its digits is 2352, while the sum is 28.

The square root of 7617421 is about 2759.9675722733. The cubic root of 7617421 is about 196.7596250512.

The spelling of 7617421 in words is "seven million, six hundred seventeen thousand, four hundred twenty-one".