7451421 has 8 divisors (see below), whose sum is σ = 9963360. Its totient is φ = 4953552.

The previous prime is 7451419. The next prime is 7451441. The reversal of 7451421 is 1241547.

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

It is not a de Polignac number, because 7451421 - 2¹ = 7451419 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7451391 and 7451400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7451441) 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, 2211 + ... + 4448.

It is an arithmetic number, because the mean of its divisors is an integer number (1245420).

Almost surely, 2^7451421 is an apocalyptic number.

It is an amenable number.

7451421 is a deficient number, since it is larger than the sum of its proper divisors (2511939).

7451421 is a wasteful number, since it uses less digits than its factorization.

7451421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7035.

The product of its digits is 1120, while the sum is 24.

The square root of 7451421 is about 2729.7291074391. The cubic root of 7451421 is about 195.3198432780.

Adding to 7451421 its reverse (1241547), we get a palindrome (8692968).

The spelling of 7451421 in words is "seven million, four hundred fifty-one thousand, four hundred twenty-one".