7421398 has 4 divisors (see below), whose sum is σ = 11132100. Its totient is φ = 3710698.

The previous prime is 7421383. The next prime is 7421437. The reversal of 7421398 is 8931247.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8931247 = 13 ⋅687019.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1855348 + ... + 1855351.

It is an arithmetic number, because the mean of its divisors is an integer number (2783025).

Almost surely, 2^7421398 is an apocalyptic number.

7421398 is a deficient number, since it is larger than the sum of its proper divisors (3710702).

7421398 is a wasteful number, since it uses less digits than its factorization.

7421398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3710701.

The product of its digits is 12096, while the sum is 34.

The square root of 7421398 is about 2724.2242932622. The cubic root of 7421398 is about 195.0571649190.

The spelling of 7421398 in words is "seven million, four hundred twenty-one thousand, three hundred ninety-eight".