7422540 has 96 divisors (see below), whose sum is σ = 23224320. Its totient is φ = 1760256.

The previous prime is 7422539. The next prime is 7422551. The reversal of 7422540 is 452247.

It is a self number, because there is not a number n which added to its sum of digits gives 7422540.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19189 + ... + 19571.

It is an arithmetic number, because the mean of its divisors is an integer number (241920).

Almost surely, 2^7422540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7422540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11612160).

7422540 is an abundant number, since it is smaller than the sum of its proper divisors (15801780).

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

7422540 is a wasteful number, since it uses less digits than its factorization.

7422540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 429 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 24.

The square root of 7422540 is about 2724.4338861496. The cubic root of 7422540 is about 195.0671694966.

Adding to 7422540 its reverse (452247), we get a palindrome (7874787).

The spelling of 7422540 in words is "seven million, four hundred twenty-two thousand, five hundred forty".