3551121 has 20 divisors (see below), whose sum is σ = 6063552. Its totient is φ = 2028888.

The previous prime is 3551101. The next prime is 3551123. The reversal of 3551121 is 1211553.

It is not a de Polignac number, because 3551121 - 2⁵ = 3551089 is a prime.

It is a super-2 number, since 2×3551121² = 25220920713282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3551094 and 3551103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3551123) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2565 + ... + 3698.

Almost surely, 2^3551121 is an apocalyptic number.

It is an amenable number.

3551121 is a deficient number, since it is larger than the sum of its proper divisors (2512431).

3551121 is an equidigital number, since it uses as much as digits as its factorization.

3551121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6282 (or 6273 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 3551121 is about 1884.4418271732. The cubic root of 3551121 is about 152.5650855390.

Adding to 3551121 its reverse (1211553), we get a palindrome (4762674).

The spelling of 3551121 in words is "three million, five hundred fifty-one thousand, one hundred twenty-one".