3565381 has 2 divisors, whose sum is σ = 3565382. Its totient is φ = 3565380.

The previous prime is 3565351. The next prime is 3565399. The reversal of 3565381 is 1835653.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2452356 + 1113025 = 1566^2 + 1055^2 .

It is a cyclic number.

It is not a de Polignac number, because 3565381 - 2¹³ = 3557189 is a prime.

It is a super-2 number, since 2×3565381² = 25423883350322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3565321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1782690 + 1782691.

It is an arithmetic number, because the mean of its divisors is an integer number (1782691).

Almost surely, 2^3565381 is an apocalyptic number.

It is an amenable number.

3565381 is a deficient number, since it is larger than the sum of its proper divisors (1).

3565381 is an equidigital number, since it uses as much as digits as its factorization.

3565381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 3565381 is about 1888.2216501248. The cubic root of 3565381 is about 152.7690279458.

The spelling of 3565381 in words is "three million, five hundred sixty-five thousand, three hundred eighty-one".