7921454 has 4 divisors (see below), whose sum is σ = 11882184. Its totient is φ = 3960726.

The previous prime is 7921451. The next prime is 7921457. The reversal of 7921454 is 4541297.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4541297 = 751 ⋅6047.

It is an interprime number because it is at equal distance from previous prime (7921451) and next prime (7921457).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7921454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1980362 + ... + 1980365.

It is an arithmetic number, because the mean of its divisors is an integer number (2970546).

Almost surely, 2^7921454 is an apocalyptic number.

7921454 is a deficient number, since it is larger than the sum of its proper divisors (3960730).

7921454 is a wasteful number, since it uses less digits than its factorization.

7921454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3960729.

The product of its digits is 10080, while the sum is 32.

The square root of 7921454 is about 2814.5077722401. The cubic root of 7921454 is about 199.3432960598.

The spelling of 7921454 in words is "seven million, nine hundred twenty-one thousand, four hundred fifty-four".