10209081 has 8 divisors (see below), whose sum is σ = 13633920. Its totient is φ = 6795152.

The previous prime is 10209071. The next prime is 10209107. The reversal of 10209081 is 18090201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10209081 - 2⁷ = 10208953 is a prime.

It is a super-2 number, since 2×10209081² = 208450669729122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10209071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210 + ... + 4523.

It is an arithmetic number, because the mean of its divisors is an integer number (1704240).

Almost surely, 2^10209081 is an apocalyptic number.

It is an amenable number.

10209081 is a deficient number, since it is larger than the sum of its proper divisors (3424839).

10209081 is an equidigital number, since it uses as much as digits as its factorization.

10209081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5455.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 10209081 is about 3195.1652539423. The cubic root of 10209081 is about 216.9346288822.

Adding to 10209081 its reverse (18090201), we get a palindrome (28299282).

It can be divided in two parts, 1020 and 9081, that added together give a palindrome (10101).

The spelling of 10209081 in words is "ten million, two hundred nine thousand, eighty-one".