7874421 has 4 divisors (see below), whose sum is σ = 10499232. Its totient is φ = 5249612.

The previous prime is 7874413. The next prime is 7874423. The reversal of 7874421 is 1244787.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1244787 = 3 ⋅414929.

It is a cyclic number.

It is not a de Polignac number, because 7874421 - 2³ = 7874413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7874423) 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 3 ways as a sum of consecutive naturals, for example, 1312401 + ... + 1312406.

It is an arithmetic number, because the mean of its divisors is an integer number (2624808).

Almost surely, 2^7874421 is an apocalyptic number.

It is an amenable number.

7874421 is a deficient number, since it is larger than the sum of its proper divisors (2624811).

7874421 is a wasteful number, since it uses less digits than its factorization.

7874421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2624810.

The product of its digits is 12544, while the sum is 33.

The square root of 7874421 is about 2806.1398753448. The cubic root of 7874421 is about 198.9479843512.

The spelling of 7874421 in words is "seven million, eight hundred seventy-four thousand, four hundred twenty-one".