3505881 has 4 divisors (see below), whose sum is σ = 4674512. Its totient is φ = 2337252.

The previous prime is 3505849. The next prime is 3505889. The reversal of 3505881 is 1885053.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3505881 - 2⁵ = 3505849 is a prime.

It is a super-2 number, since 2×3505881² = 24582403172322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3505889) 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, 584311 + ... + 584316.

It is an arithmetic number, because the mean of its divisors is an integer number (1168628).

Almost surely, 2^3505881 is an apocalyptic number.

It is an amenable number.

3505881 is a deficient number, since it is larger than the sum of its proper divisors (1168631).

3505881 is a wasteful number, since it uses less digits than its factorization.

3505881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168630.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 3505881 is about 1872.3997970519. The cubic root of 3505881 is about 151.9144399594.

The spelling of 3505881 in words is "three million, five hundred five thousand, eight hundred eighty-one".