1240081 has 2 divisors, whose sum is σ = 1240082. Its totient is φ = 1240080.

The previous prime is 1240039. The next prime is 1240087. The reversal of 1240081 is 1800421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1175056 + 65025 = 1084^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240081 - 2⁹ = 1239569 is a prime.

It is a super-2 number, since 2×1240081² = 3075601773122, which contains 22 as substring.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (1240087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620040 + 620041.

It is an arithmetic number, because the mean of its divisors is an integer number (620041).

2^1240081 is an apocalyptic number.

It is an amenable number.

1240081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240081 is an equidigital number, since it uses as much as digits as its factorization.

1240081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1240081 is about 1113.5892420457. The cubic root of 1240081 is about 107.4360463303.

The spelling of 1240081 in words is "one million, two hundred forty thousand, eighty-one".