7542015420 has 192 divisors, whose sum is σ = 23184322560. Its totient is φ = 1824768000.

The previous prime is 7542015347. The next prime is 7542015427. The reversal of 7542015420 is 245102457.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7542015427) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3568284 + ... + 3570396.

It is an arithmetic number, because the mean of its divisors is an integer number (120751680).

Almost surely, 2^7542015420 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 7542015420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11592161280).

7542015420 is an abundant number, since it is smaller than the sum of its proper divisors (15642307140).

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

7542015420 is a wasteful number, since it uses less digits than its factorization.

7542015420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276 (or 2274 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 30.

The square root of 7542015420 is about 86844.7777359122. Note that the first 4 decimals coincide. The cubic root of 7542015420 is about 1961.0822341295.

Adding to 7542015420 its reverse (245102457), we get a palindrome (7787117877).

The spelling of 7542015420 in words is "seven billion, five hundred forty-two million, fifteen thousand, four hundred twenty".