3723581 has 2 divisors, whose sum is σ = 3723582. Its totient is φ = 3723580.

The previous prime is 3723547. The next prime is 3723589. The reversal of 3723581 is 1853273.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3705625 + 17956 = 1925^2 + 134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3723581 is a prime.

It is a super-2 number, since 2×3723581² = 27730110927122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₂₆₄₉₅₃ and since 3723581 and 264953 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3723589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1861790 + 1861791.

It is an arithmetic number, because the mean of its divisors is an integer number (1861791).

Almost surely, 2^3723581 is an apocalyptic number.

It is an amenable number.

3723581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3723581 is an equidigital number, since it uses as much as digits as its factorization.

3723581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 3723581 is about 1929.6582598999. The cubic root of 3723581 is about 154.9959208084.

The spelling of 3723581 in words is "three million, seven hundred twenty-three thousand, five hundred eighty-one".