9780241 has 2 divisors, whose sum is σ = 9780242. Its totient is φ = 9780240.

The previous prime is 9780233. The next prime is 9780317. The reversal of 9780241 is 1420879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8242641 + 1537600 = 2871^2 + 1240^2 .

It is an emirp because it is prime and its reverse (1420879) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9780241 - 2³ = 9780233 is a prime.

It is a super-2 number, since 2×9780241² = 191306228036162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9780341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4890120 + 4890121.

It is an arithmetic number, because the mean of its divisors is an integer number (4890121).

Almost surely, 2^9780241 is an apocalyptic number.

It is an amenable number.

9780241 is a deficient number, since it is larger than the sum of its proper divisors (1).

9780241 is an equidigital number, since it uses as much as digits as its factorization.

9780241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 9780241 is about 3127.3376856361. The cubic root of 9780241 is about 213.8535770144.

The spelling of 9780241 in words is "nine million, seven hundred eighty thousand, two hundred forty-one".