3121001 has 8 divisors (see below), whose sum is σ = 3395784. Its totient is φ = 2851200.

The previous prime is 3120991. The next prime is 3121007. The reversal of 3121001 is 1001213.

It can be written as a sum of positive squares in 4 ways, for example, as 561001 + 2560000 = 749^2 + 1600^2 .

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 3121001 - 2⁶ = 3120937 is a prime.

It is a Duffinian 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 3121001.

It is not an unprimeable number, because it can be changed into a prime (3121007) 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, 125 + ... + 2501.

It is an arithmetic number, because the mean of its divisors is an integer number (424473).

Almost surely, 2^3121001 is an apocalyptic number.

It is an amenable number.

3121001 is a deficient number, since it is larger than the sum of its proper divisors (274783).

3121001 is a wasteful number, since it uses less digits than its factorization.

3121001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 3121001 is about 1766.6355028698. The cubic root of 3121001 is about 146.1384968396.

Adding to 3121001 its reverse (1001213), we get a palindrome (4122214).

The spelling of 3121001 in words is "three million, one hundred twenty-one thousand, one".