7522420 has 24 divisors (see below), whose sum is σ = 16166304. Its totient is φ = 2938656.

The previous prime is 7522409. The next prime is 7522439. The reversal of 7522420 is 242257.

It is a junction number, because it is equal to n+sod(n) for n = 7522391 and 7522400.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3514 + ... + 5233.

It is an arithmetic number, because the mean of its divisors is an integer number (673596).

Almost surely, 2^7522420 is an apocalyptic number.

It is an amenable number.

7522420 is an abundant number, since it is smaller than the sum of its proper divisors (8643884).

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

7522420 is a wasteful number, since it uses less digits than its factorization.

7522420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8799 (or 8797 counting only the distinct ones).

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

The square root of 7522420 is about 2742.7030462666. The cubic root of 7522420 is about 195.9382354323.

Adding to 7522420 its reverse (242257), we get a palindrome (7764677).

The spelling of 7522420 in words is "seven million, five hundred twenty-two thousand, four hundred twenty".