1200581 has 2 divisors, whose sum is σ = 1200582. Its totient is φ = 1200580.

The previous prime is 1200527. The next prime is 1200583. The reversal of 1200581 is 1850021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 919681 + 280900 = 959^2 + 530^2 .

It is an emirp because it is prime and its reverse (1850021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200581 - 2¹⁰ = 1199557 is a prime.

It is a super-2 number, since 2×1200581² = 2882789475122, which contains 22 as substring.

Together with 1200583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600290 + 600291.

It is an arithmetic number, because the mean of its divisors is an integer number (600291).

2^1200581 is an apocalyptic number.

It is an amenable number.

1200581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200581 is an equidigital number, since it uses as much as digits as its factorization.

1200581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1200581 is about 1095.7102719241. The cubic root of 1200581 is about 106.2830042797.

The spelling of 1200581 in words is "one million, two hundred thousand, five hundred eighty-one".