7421523 has 8 divisors (see below), whose sum is σ = 10043328. Its totient is φ = 4873704.

The previous prime is 7421509. The next prime is 7421539. The reversal of 7421523 is 3251247.

7421523 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 7421523 - 2¹⁰ = 7420499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7421493 and 7421502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7421563) 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 7 ways as a sum of consecutive naturals, for example, 18261 + ... + 18662.

It is an arithmetic number, because the mean of its divisors is an integer number (1255416).

Almost surely, 2^7421523 is an apocalyptic number.

7421523 is a deficient number, since it is larger than the sum of its proper divisors (2621805).

7421523 is a wasteful number, since it uses less digits than its factorization.

7421523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36993.

The product of its digits is 1680, while the sum is 24.

The square root of 7421523 is about 2724.2472354763. The cubic root of 7421523 is about 195.0582600410.

The spelling of 7421523 in words is "seven million, four hundred twenty-one thousand, five hundred twenty-three".