7500081 has 4 divisors (see below), whose sum is σ = 10000112. Its totient is φ = 5000052.

The previous prime is 7500071. The next prime is 7500091. The reversal of 7500081 is 1800057.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (7500071) and next prime (7500091).

It is not a de Polignac number, because 7500081 - 2⁵ = 7500049 is a prime.

It is a super-2 number, since 2×7500081² = 112502430013122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7500061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250011 + ... + 1250016.

It is an arithmetic number, because the mean of its divisors is an integer number (2500028).

Almost surely, 2^7500081 is an apocalyptic number.

It is an amenable number.

7500081 is a deficient number, since it is larger than the sum of its proper divisors (2500031).

7500081 is a wasteful number, since it uses less digits than its factorization.

7500081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500030.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 7500081 is about 2738.6275759950. The cubic root of 7500081 is about 195.7440867321.

The spelling of 7500081 in words is "seven million, five hundred thousand, eighty-one".