7540423 has 4 divisors (see below), whose sum is σ = 8225928. Its totient is φ = 6854920.

The previous prime is 7540411. The next prime is 7540439. The reversal of 7540423 is 3240457.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7540423 - 2⁵ = 7540391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7540453) 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, 342736 + ... + 342757.

It is an arithmetic number, because the mean of its divisors is an integer number (2056482).

Almost surely, 2^7540423 is an apocalyptic number.

7540423 is a deficient number, since it is larger than the sum of its proper divisors (685505).

7540423 is a wasteful number, since it uses less digits than its factorization.

7540423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685504.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 7540423 is about 2745.9830662260. The cubic root of 7540423 is about 196.0944203545.

The spelling of 7540423 in words is "seven million, five hundred forty thousand, four hundred twenty-three".