245611 has 4 divisors (see below), whose sum is σ = 248800. Its totient is φ = 242424.

The previous prime is 245593. The next prime is 245621. The reversal of 245611 is 116542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 116542 = 2 ⋅58271.

It is a cyclic number.

It is not a de Polignac number, because 245611 - 2¹⁵ = 212843 is a prime.

It is a Duffinian number.

245611 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (245621) 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, 1476 + ... + 1633.

It is an arithmetic number, because the mean of its divisors is an integer number (62200).

2²⁴⁵⁶¹¹ is an apocalyptic number.

245611 is a deficient number, since it is larger than the sum of its proper divisors (3189).

245611 is an equidigital number, since it uses as much as digits as its factorization.

245611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3188.

The product of its digits is 240, while the sum is 19.

The square root of 245611 is about 495.5915657071. The cubic root of 245611 is about 62.6252209479.

The spelling of 245611 in words is "two hundred forty-five thousand, six hundred eleven".