3551965 has 8 divisors (see below), whose sum is σ = 4272480. Its totient is φ = 2834832.

The previous prime is 3551957. The next prime is 3551981. The reversal of 3551965 is 5691553.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3551965 - 2³ = 3551957 is a prime.

It is a super-2 number, since 2×3551965² = 25232910722450, which contains 22 as substring.

3551965 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3551965.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3706 + ... + 4564.

It is an arithmetic number, because the mean of its divisors is an integer number (534060).

Almost surely, 2^3551965 is an apocalyptic number.

It is an amenable number.

3551965 is a deficient number, since it is larger than the sum of its proper divisors (720515).

3551965 is an equidigital number, since it uses as much as digits as its factorization.

3551965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1691.

The product of its digits is 20250, while the sum is 34.

The square root of 3551965 is about 1884.6657528591. The cubic root of 3551965 is about 152.5771713688.

The spelling of 3551965 in words is "three million, five hundred fifty-one thousand, nine hundred sixty-five".