7423121 has 4 divisors (see below), whose sum is σ = 7527744. Its totient is φ = 7318500.

The previous prime is 7423111. The next prime is 7423153. The reversal of 7423121 is 1213247.

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.

It is a cyclic number.

It is not a de Polignac number, because 7423121 - 2⁶ = 7423057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7423093 and 7423102.

It is not an unprimeable number, because it can be changed into a prime (7423111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52205 + ... + 52346.

It is an arithmetic number, because the mean of its divisors is an integer number (1881936).

Almost surely, 2^7423121 is an apocalyptic number.

7423121 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

7423121 is a deficient number, since it is larger than the sum of its proper divisors (104623).

7423121 is a wasteful number, since it uses less digits than its factorization.

7423121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104622.

The product of its digits is 336, while the sum is 20.

The square root of 7423121 is about 2724.5405117194. The cubic root of 7423121 is about 195.0722589974.

Adding to 7423121 its reverse (1213247), we get a palindrome (8636368).

The spelling of 7423121 in words is "seven million, four hundred twenty-three thousand, one hundred twenty-one".