7542756 has 72 divisors (see below), whose sum is σ = 20913984. Its totient is φ = 2278080.

The previous prime is 7542749. The next prime is 7542761. The reversal of 7542756 is 6572457.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7542756.

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 23 ways as a sum of consecutive naturals, for example, 33115 + ... + 33341.

It is an arithmetic number, because the mean of its divisors is an integer number (290472).

Almost surely, 2^7542756 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 7542756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10456992).

7542756 is an abundant number, since it is smaller than the sum of its proper divisors (13371228).

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

7542756 is a wasteful number, since it uses less digits than its factorization.

7542756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321 (or 316 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 7542756 is about 2746.4078357010. The cubic root of 7542756 is about 196.1146420808.

Subtracting from 7542756 its reverse (6572457), we obtain a cube (970299 = 99³).

The spelling of 7542756 in words is "seven million, five hundred forty-two thousand, seven hundred fifty-six".