9087021 has 6 divisors (see below), whose sum is σ = 13125710. Its totient is φ = 6058008.

The previous prime is 9087017. The next prime is 9087049. The reversal of 9087021 is 1207809.

It can be written as a sum of positive squares in only one way, i.e., 5225796 + 3861225 = 2286^2 + 1965^2 .

It is not a de Polignac number, because 9087021 - 2² = 9087017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9080021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 504826 + ... + 504843.

Almost surely, 2^9087021 is an apocalyptic number.

It is an amenable number.

9087021 is a deficient number, since it is larger than the sum of its proper divisors (4038689).

9087021 is a wasteful number, since it uses less digits than its factorization.

9087021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009675 (or 1009672 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 9087021 is about 3014.4686098880. The cubic root of 9087021 is about 208.6766441191.

The spelling of 9087021 in words is "nine million, eighty-seven thousand, twenty-one".