7421040 has 120 divisors (see below), whose sum is σ = 27217008. Its totient is φ = 1797120.

The previous prime is 7421033. The next prime is 7421083. The reversal of 7421040 is 401247.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

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

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 23 ways as a sum of consecutive naturals, for example, 7452 + ... + 8388.

Almost surely, 2^7421040 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 7421040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13608504).

7421040 is an abundant number, since it is smaller than the sum of its proper divisors (19795968).

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

7421040 is a wasteful number, since it uses less digits than its factorization.

7421040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 967 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 7421040 is about 2724.1585856921. The cubic root of 7421040 is about 195.0540284215.

Adding to 7421040 its reverse (401247), we get a palindrome (7822287).

The spelling of 7421040 in words is "seven million, four hundred twenty-one thousand, forty".