7109421 has 16 divisors (see below), whose sum is σ = 10452288. Its totient is φ = 4262400.

The previous prime is 7109407. The next prime is 7109423. The reversal of 7109421 is 1249017.

It is not a de Polignac number, because 7109421 - 2⁷ = 7109293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7109391 and 7109400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7109423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2091 + ... + 4311.

It is an arithmetic number, because the mean of its divisors is an integer number (653268).

Almost surely, 2^7109421 is an apocalyptic number.

It is an amenable number.

7109421 is a deficient number, since it is larger than the sum of its proper divisors (3342867).

7109421 is a wasteful number, since it uses less digits than its factorization.

7109421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 7109421 is about 2666.3497520018. The cubic root of 7109421 is about 192.2847067379.

The spelling of 7109421 in words is "seven million, one hundred nine thousand, four hundred twenty-one".