7421997 has 8 divisors (see below), whose sum is σ = 10795680. Its totient is φ = 4498160.

The previous prime is 7421993. The next prime is 7422001. The reversal of 7421997 is 7991247.

7421997 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7421993) and next prime (7422001).

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

It is a cyclic number.

It is not a de Polignac number, because 7421997 - 2² = 7421993 is a prime.

It is a super-3 number, since 3×7421997³ (a number of 22 digits) contains 333 as substring.

7421997 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112422 + ... + 112487.

It is an arithmetic number, because the mean of its divisors is an integer number (1349460).

Almost surely, 2^7421997 is an apocalyptic number.

It is an amenable number.

7421997 is a deficient number, since it is larger than the sum of its proper divisors (3373683).

7421997 is a wasteful number, since it uses less digits than its factorization.

7421997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224923.

The product of its digits is 31752, while the sum is 39.

The square root of 7421997 is about 2724.3342305965. The cubic root of 7421997 is about 195.0624126319.

The spelling of 7421997 in words is "seven million, four hundred twenty-one thousand, nine hundred ninety-seven".