9121081 has 2 divisors, whose sum is σ = 9121082. Its totient is φ = 9121080.

The previous prime is 9121067. The next prime is 9121097. The reversal of 9121081 is 1801219.

9121081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8643600 + 477481 = 2940^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 9121081 - 2¹³ = 9112889 is a prime.

It is a super-2 number, since 2×9121081² = 166388237217122, which contains 22 as substring.

9121081 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (9121681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560540 + 4560541.

It is an arithmetic number, because the mean of its divisors is an integer number (4560541).

Almost surely, 2^9121081 is an apocalyptic number.

It is an amenable number.

9121081 is a deficient number, since it is larger than the sum of its proper divisors (1).

9121081 is an equidigital number, since it uses as much as digits as its factorization.

9121081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 9121081 is about 3020.1127462398. The cubic root of 9121081 is about 208.9370398635.

The spelling of 9121081 in words is "nine million, one hundred twenty-one thousand, eighty-one".