7500042 has 24 divisors (see below), whose sum is σ = 17727840. Its totient is φ = 2272680.

The previous prime is 7500029. The next prime is 7500049. The reversal of 7500042 is 2400057.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 7499988 and 7500024.

It is not an unprimeable number, because it can be changed into a prime (7500049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18742 + ... + 19137.

It is an arithmetic number, because the mean of its divisors is an integer number (738660).

Almost surely, 2^7500042 is an apocalyptic number.

7500042 is an abundant number, since it is smaller than the sum of its proper divisors (10227798).

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

7500042 is a wasteful number, since it uses less digits than its factorization.

7500042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37898 (or 37895 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 7500042 is about 2738.6204556309. The cubic root of 7500042 is about 195.7437474454.

Adding to 7500042 its reverse (2400057), we get a palindrome (9900099).

The spelling of 7500042 in words is "seven million, five hundred thousand, forty-two".