7123420 has 12 divisors (see below), whose sum is σ = 14959224. Its totient is φ = 2849360.

The previous prime is 7123411. The next prime is 7123421. The reversal of 7123420 is 243217.

7123420 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×7123420² = 101486224992800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7123421) 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, 178066 + ... + 178105.

It is an arithmetic number, because the mean of its divisors is an integer number (1246602).

Almost surely, 2^7123420 is an apocalyptic number.

It is an amenable number.

7123420 is an abundant number, since it is smaller than the sum of its proper divisors (7835804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7123420 is a wasteful number, since it uses less digits than its factorization.

7123420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356180 (or 356178 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 7123420 is about 2668.9735854819. The cubic root of 7123420 is about 192.4108318122.

Adding to 7123420 its reverse (243217), we get a palindrome (7366637).

The spelling of 7123420 in words is "seven million, one hundred twenty-three thousand, four hundred twenty".