611261 has 4 divisors (see below), whose sum is σ = 698592. Its totient is φ = 523932.

The previous prime is 611257. The next prime is 611263. The reversal of 611261 is 162116.

It is a happy number.

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 not a de Polignac number, because 611261 - 2² = 611257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611263) 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, 43655 + ... + 43668.

It is an arithmetic number, because the mean of its divisors is an integer number (174648).

2⁶¹¹²⁶¹ is an apocalyptic number.

It is an amenable number.

611261 is a deficient number, since it is larger than the sum of its proper divisors (87331).

611261 is an equidigital number, since it uses as much as digits as its factorization.

611261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87330.

The product of its digits is 72, while the sum is 17.

The square root of 611261 is about 781.8318233482. The cubic root of 611261 is about 84.8676602675.

Adding to 611261 its reverse (162116), we get a palindrome (773377).

The spelling of 611261 in words is "six hundred eleven thousand, two hundred sixty-one".