7648421 has 8 divisors (see below), whose sum is σ = 8421600. Its totient is φ = 6888240.

The previous prime is 7648411. The next prime is 7648439. The reversal of 7648421 is 1248467.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7648421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7648411) 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, 1991 + ... + 4388.

It is an arithmetic number, because the mean of its divisors is an integer number (1052700).

Almost surely, 2^7648421 is an apocalyptic number.

It is an amenable number.

7648421 is a deficient number, since it is larger than the sum of its proper divisors (773179).

7648421 is a wasteful number, since it uses less digits than its factorization.

7648421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6499.

The product of its digits is 10752, while the sum is 32.

The square root of 7648421 is about 2765.5778781296. The cubic root of 7648421 is about 197.0261760162.

The spelling of 7648421 in words is "seven million, six hundred forty-eight thousand, four hundred twenty-one".