10202581 has 2 divisors, whose sum is σ = 10202582. Its totient is φ = 10202580.

The previous prime is 10202579. The next prime is 10202587. The reversal of 10202581 is 18520201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9548100 + 654481 = 3090^2 + 809^2 .

It is a cyclic number.

It is not a de Polignac number, because 10202581 - 2¹ = 10202579 is a prime.

It is a super-2 number, since 2×10202581² = 208185318123122, which contains 22 as substring.

Together with 10202579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10202587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101290 + 5101291.

It is an arithmetic number, because the mean of its divisors is an integer number (5101291).

Almost surely, 2^10202581 is an apocalyptic number.

It is an amenable number.

10202581 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202581 is an equidigital number, since it uses as much as digits as its factorization.

10202581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 10202581 is about 3194.1479301999. The cubic root of 10202581 is about 216.8885792116. Note that the first 3 decimals are identical.

Adding to 10202581 its reverse (18520201), we get a palindrome (28722782).

The spelling of 10202581 in words is "ten million, two hundred two thousand, five hundred eighty-one".