2067581 has 2 divisors, whose sum is σ = 2067582. Its totient is φ = 2067580.

The previous prime is 2067547. The next prime is 2067587. The reversal of 2067581 is 1857602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1136356 + 931225 = 1066^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 2067581 - 2⁶ = 2067517 is a prime.

It is a super-2 number, since 2×2067581² = 8549782383122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2067587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1033790 + 1033791.

It is an arithmetic number, because the mean of its divisors is an integer number (1033791).

2^2067581 is an apocalyptic number.

It is an amenable number.

2067581 is a deficient number, since it is larger than the sum of its proper divisors (1).

2067581 is an equidigital number, since it uses as much as digits as its factorization.

2067581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 2067581 is about 1437.9085506387. The cubic root of 2067581 is about 127.3955263617.

The spelling of 2067581 in words is "two million, sixty-seven thousand, five hundred eighty-one".