3581901 has 10 divisors (see below), whose sum is σ = 5350862. Its totient is φ = 2387880.

The previous prime is 3581881. The next prime is 3581911. The reversal of 3581901 is 1091853.

It can be written as a sum of positive squares in only one way, i.e., 3572100 + 9801 = 1890^2 + 99^2 .

It is not a de Polignac number, because 3581901 - 2⁵ = 3581869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3581911) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 22030 + ... + 22191.

Almost surely, 2^3581901 is an apocalyptic number.

It is an amenable number.

3581901 is a deficient number, since it is larger than the sum of its proper divisors (1768961).

3581901 is an equidigital number, since it uses as much as digits as its factorization.

3581901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44233 (or 44224 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 3581901 is about 1892.5910810315. The cubic root of 3581901 is about 153.0046134710.

The spelling of 3581901 in words is "three million, five hundred eighty-one thousand, nine hundred one".