7542420534 has 72 divisors (see below), whose sum is σ = 18008641560. Its totient is φ = 2279724480.

The previous prime is 7542420493. The next prime is 7542420563. The reversal of 7542420534 is 4350242457.

It is a congruent 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 35 ways as a sum of consecutive naturals, for example, 886569 + ... + 895035.

Almost surely, 2^7542420534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7542420534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9004320780).

7542420534 is an abundant number, since it is smaller than the sum of its proper divisors (10466221026).

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

7542420534 is a wasteful number, since it uses less digits than its factorization.

7542420534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8906 (or 8892 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 36.

The square root of 7542420534 is about 86847.1101073605. The cubic root of 7542420534 is about 1961.1173462138.

The spelling of 7542420534 in words is "seven billion, five hundred forty-two million, four hundred twenty thousand, five hundred thirty-four".