7122540 has 24 divisors (see below), whose sum is σ = 19943280. Its totient is φ = 1899328.

The previous prime is 7122517. The next prime is 7122551. The reversal of 7122540 is 452217.

It is an Ulam number.

It is an unprimeable number.

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, 59295 + ... + 59414.

It is an arithmetic number, because the mean of its divisors is an integer number (830970).

Almost surely, 2^7122540 is an apocalyptic number.

It is an amenable number.

7122540 is an abundant number, since it is smaller than the sum of its proper divisors (12820740).

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

7122540 is a wasteful number, since it uses less digits than its factorization.

7122540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118721 (or 118719 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 7122540 is about 2668.8087230073. The cubic root of 7122540 is about 192.4029082538.

Adding to 7122540 its reverse (452217), we get a palindrome (7574757).

The spelling of 7122540 in words is "seven million, one hundred twenty-two thousand, five hundred forty".