3537881 has 4 divisors (see below), whose sum is σ = 3574452. Its totient is φ = 3501312.

The previous prime is 3537871. The next prime is 3537899. The reversal of 3537881 is 1887353.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1478656 + 2059225 = 1216^2 + 1435^2 .

It is not a de Polignac number, because 3537881 - 2¹⁸ = 3275737 is a prime.

It is a super-2 number, since 2×3537881² = 25033203940322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3537811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18140 + ... + 18333.

It is an arithmetic number, because the mean of its divisors is an integer number (893613).

Almost surely, 2^3537881 is an apocalyptic number.

It is an amenable number.

3537881 is a deficient number, since it is larger than the sum of its proper divisors (36571).

3537881 is an equidigital number, since it uses as much as digits as its factorization.

3537881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36570.

The product of its digits is 20160, while the sum is 35.

The square root of 3537881 is about 1880.9255700319. The cubic root of 3537881 is about 152.3752415100.

The spelling of 3537881 in words is "three million, five hundred thirty-seven thousand, eight hundred eighty-one".