2111261 has 4 divisors (see below), whose sum is σ = 2222400. Its totient is φ = 2000124.

The previous prime is 2111251. The next prime is 2111267. The reversal of 2111261 is 1621112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2111261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111267) 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, 55541 + ... + 55578.

It is an arithmetic number, because the mean of its divisors is an integer number (555600).

2^2111261 is an apocalyptic number.

It is an amenable number.

2111261 is a deficient number, since it is larger than the sum of its proper divisors (111139).

2111261 is a wasteful number, since it uses less digits than its factorization.

2111261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111138.

The product of its digits is 24, while the sum is 14.

The square root of 2111261 is about 1453.0178939022. The cubic root of 2111261 is about 128.2864070105.

Adding to 2111261 its reverse (1621112), we get a palindrome (3732373).

The spelling of 2111261 in words is "two million, one hundred eleven thousand, two hundred sixty-one".