7542420 has 24 divisors (see below), whose sum is σ = 21118944. Its totient is φ = 2011296.

The previous prime is 7542389. The next prime is 7542439. The reversal of 7542420 is 242457.

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, 62794 + ... + 62913.

It is an arithmetic number, because the mean of its divisors is an integer number (879956).

Almost surely, 2^7542420 is an apocalyptic number.

It is an amenable number.

7542420 is an abundant number, since it is smaller than the sum of its proper divisors (13576524).

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

7542420 is a wasteful number, since it uses less digits than its factorization.

7542420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125719 (or 125717 counting only the distinct ones).

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

The square root of 7542420 is about 2746.3466642068. The cubic root of 7542420 is about 196.1117299932. Note that the first 3 decimals are identical.

Adding to 7542420 its reverse (242457), we get a palindrome (7784877).

The spelling of 7542420 in words is "seven million, five hundred forty-two thousand, four hundred twenty".