2661121 has 8 divisors (see below), whose sum is σ = 2818080. Its totient is φ = 2505888.

The previous prime is 2661119. The next prime is 2661137. The reversal of 2661121 is 1211662.

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 2661121 - 2¹ = 2661119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2661161) 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, 4005 + ... + 4621.

It is an arithmetic number, because the mean of its divisors is an integer number (352260).

2^2661121 is an apocalyptic number.

It is an amenable number.

2661121 is a deficient number, since it is larger than the sum of its proper divisors (156959).

2661121 is a wasteful number, since it uses less digits than its factorization.

2661121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863.

The product of its digits is 144, while the sum is 19.

The square root of 2661121 is about 1631.2942714299. The cubic root of 2661121 is about 138.5760593931.

Adding to 2661121 its reverse (1211662), we get a palindrome (3872783).

The spelling of 2661121 in words is "two million, six hundred sixty-one thousand, one hundred twenty-one".