3551409 has 6 divisors (see below), whose sum is σ = 5129826. Its totient is φ = 2367600.

The previous prime is 3551389. The next prime is 3551411. The reversal of 3551409 is 9041553.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 91809 = 1860^2 + 303^2 .

It is not a de Polignac number, because 3551409 - 2¹⁷ = 3420337 is a prime.

It is a super-2 number, since 2×3551409² = 25225011770562, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3551489) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197292 + ... + 197309.

It is an arithmetic number, because the mean of its divisors is an integer number (854971).

Almost surely, 2^3551409 is an apocalyptic number.

It is an amenable number.

3551409 is a deficient number, since it is larger than the sum of its proper divisors (1578417).

3551409 is a wasteful number, since it uses less digits than its factorization.

3551409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394607 (or 394604 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 3551409 is about 1884.5182408244. The cubic root of 3551409 is about 152.5692098288.

It can be divided in two parts, 355 and 1409, that added together give a square (1764 = 42²).

The spelling of 3551409 in words is "three million, five hundred fifty-one thousand, four hundred nine".