1111261 has 4 divisors (see below), whose sum is σ = 1113372. Its totient is φ = 1109152.

The previous prime is 1111259. The next prime is 1111283. The reversal of 1111261 is 1621111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 99225 + 1012036 = 315^2 + 1006^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111261 - 2¹ = 1111259 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 (1111211) 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, 465 + ... + 1561.

It is an arithmetic number, because the mean of its divisors is an integer number (278343).

2^1111261 is an apocalyptic number.

It is an amenable number.

1111261 is a deficient number, since it is larger than the sum of its proper divisors (2111).

1111261 is a wasteful number, since it uses less digits than its factorization.

1111261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110.

The product of its digits is 12, while the sum is 13.

The square root of 1111261 is about 1054.1636495345. The cubic root of 1111261 is about 103.5790740520.

Adding to 1111261 its reverse (1621111), we get a palindrome (2732372).

The spelling of 1111261 in words is "one million, one hundred eleven thousand, two hundred sixty-one".