3631121 has 4 divisors (see below), whose sum is σ = 3910452. Its totient is φ = 3351792.

The previous prime is 3631073. The next prime is 3631139. The reversal of 3631121 is 1211363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1211363 = 751 ⋅1613.

It can be written as a sum of positive squares in 2 ways, for example, as 190096 + 3441025 = 436^2 + 1855^2 .

It is a cyclic number.

It is not a de Polignac number, because 3631121 - 2¹⁰ = 3630097 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3631121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3631141) 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, 139646 + ... + 139671.

It is an arithmetic number, because the mean of its divisors is an integer number (977613).

Almost surely, 2^3631121 is an apocalyptic number.

It is an amenable number.

3631121 is a deficient number, since it is larger than the sum of its proper divisors (279331).

3631121 is a wasteful number, since it uses less digits than its factorization.

3631121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279330.

The product of its digits is 108, while the sum is 17.

The square root of 3631121 is about 1905.5500518223. The cubic root of 3631121 is about 153.7022554288.

Adding to 3631121 its reverse (1211363), we get a palindrome (4842484).

The spelling of 3631121 in words is "three million, six hundred thirty-one thousand, one hundred twenty-one".