7500420 has 36 divisors (see below), whose sum is σ = 22751820. Its totient is φ = 2000064.

The previous prime is 7500413. The next prime is 7500439. The reversal of 7500420 is 240057.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1855044 + 5645376 = 1362^2 + 2376^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 7500393 and 7500402.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20655 + ... + 21014.

It is an arithmetic number, because the mean of its divisors is an integer number (631995).

Almost surely, 2^7500420 is an apocalyptic number.

It is an amenable number.

7500420 is an abundant number, since it is smaller than the sum of its proper divisors (15251400).

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

7500420 is a wasteful number, since it uses less digits than its factorization.

7500420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41684 (or 41679 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 7500420 is about 2738.6894676104. The cubic root of 7500420 is about 195.7470358667.

Adding to 7500420 its reverse (240057), we get a palindrome (7740477).

The spelling of 7500420 in words is "seven million, five hundred thousand, four hundred twenty".