75090042 has 24 divisors (see below), whose sum is σ = 162856980. Its totient is φ = 25005120.

The previous prime is 75090023. The next prime is 75090061. The reversal of 75090042 is 24009057.

It is an interprime number because it is at equal distance from previous prime (75090023) and next prime (75090061).

It can be written as a sum of positive squares in 2 ways, for example, as 63536841 + 11553201 = 7971^2 + 3399^2 .

It is a junction number, because it is equal to n+sod(n) for n = 75089988 and 75090015.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29542 + ... + 31982.

Almost surely, 2^75090042 is an apocalyptic number.

75090042 is an abundant number, since it is smaller than the sum of its proper divisors (87766938).

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

75090042 is a wasteful number, since it uses less digits than its factorization.

75090042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158 (or 4155 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 75090042 is about 8665.4510557732. The cubic root of 75090042 is about 421.8850304117.

Adding to 75090042 its reverse (24009057), we get a palindrome (99099099).

The spelling of 75090042 in words is "seventy-five million, ninety thousand, forty-two".