3551649 has 8 divisors (see below), whose sum is σ = 4836480. Its totient is φ = 2317296.

The previous prime is 3551641. The next prime is 3551663. The reversal of 3551649 is 9461553.

It is a happy number.

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

It is not a de Polignac number, because 3551649 - 2³ = 3551641 is a prime.

It is a super-2 number, since 2×3551649² = 25228421238402, which contains 22 as substring.

3551649 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3551641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12454 + ... + 12735.

It is an arithmetic number, because the mean of its divisors is an integer number (604560).

Almost surely, 2^3551649 is an apocalyptic number.

It is an amenable number.

3551649 is a deficient number, since it is larger than the sum of its proper divisors (1284831).

3551649 is a wasteful number, since it uses less digits than its factorization.

3551649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25239.

The product of its digits is 16200, while the sum is 33.

The square root of 3551649 is about 1884.5819165003. The cubic root of 3551649 is about 152.5726465667.

The spelling of 3551649 in words is "three million, five hundred fifty-one thousand, six hundred forty-nine".