7540420 has 12 divisors (see below), whose sum is σ = 15834924. Its totient is φ = 3016160.

The previous prime is 7540411. The next prime is 7540439. The reversal of 7540420 is 240457.

It can be written as a sum of positive squares in 2 ways, for example, as 5982916 + 1557504 = 2446^2 + 1248^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7540391 and 7540400.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188491 + ... + 188530.

It is an arithmetic number, because the mean of its divisors is an integer number (1319577).

Almost surely, 2^7540420 is an apocalyptic number.

It is an amenable number.

7540420 is an abundant number, since it is smaller than the sum of its proper divisors (8294504).

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

7540420 is a wasteful number, since it uses less digits than its factorization.

7540420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377030 (or 377028 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 7540420 is about 2745.9825199735. The cubic root of 7540420 is about 196.0943943488.

Adding to 7540420 its reverse (240457), we get a palindrome (7780877).

The spelling of 7540420 in words is "seven million, five hundred forty thousand, four hundred twenty".