7654421 has 4 divisors (see below), whose sum is σ = 7660812. Its totient is φ = 7648032.

The previous prime is 7654411. The next prime is 7654429. The reversal of 7654421 is 1244567.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4157521 + 3496900 = 2039^2 + 1870^2 .

It is a cyclic number.

It is not a de Polignac number, because 7654421 - 2⁶ = 7654357 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7654429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800 + ... + 3993.

It is an arithmetic number, because the mean of its divisors is an integer number (1915203).

Almost surely, 2^7654421 is an apocalyptic number.

It is an amenable number.

7654421 is a deficient number, since it is larger than the sum of its proper divisors (6391).

7654421 is a wasteful number, since it uses less digits than its factorization.

7654421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390.

The product of its digits is 6720, while the sum is 29.

The square root of 7654421 is about 2766.6624297156. The cubic root of 7654421 is about 197.0776832953.

Adding to 7654421 its reverse (1244567), we get a palindrome (8898988).

The spelling of 7654421 in words is "seven million, six hundred fifty-four thousand, four hundred twenty-one".