2069581 has 2 divisors, whose sum is σ = 2069582. Its totient is φ = 2069580.

The previous prime is 2069569. The next prime is 2069603. The reversal of 2069581 is 1859602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 13225 = 1434^2 + 115^2 .

It is a cyclic number.

It is not a de Polignac number, because 2069581 - 2⁵ = 2069549 is a prime.

It is a super-2 number, since 2×2069581² = 8566331031122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2069531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1034790 + 1034791.

It is an arithmetic number, because the mean of its divisors is an integer number (1034791).

2^2069581 is an apocalyptic number.

It is an amenable number.

2069581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2069581 is an equidigital number, since it uses as much as digits as its factorization.

2069581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 2069581 is about 1438.6038370587. The cubic root of 2069581 is about 127.4365902817.

The spelling of 2069581 in words is "two million, sixty-nine thousand, five hundred eighty-one".