122545 has 4 divisors (see below), whose sum is σ = 147060. Its totient is φ = 98032.

The previous prime is 122533. The next prime is 122557. The reversal of 122545 is 545221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545221 = 709 ⋅769.

It is an interprime number because it is at equal distance from previous prime (122533) and next prime (122557).

It can be written as a sum of positive squares in 2 ways, for example, as 82944 + 39601 = 288^2 + 199^2 .

It is a cyclic number.

It is not a de Polignac number, because 122545 - 2⁹ = 122033 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12250 + ... + 12259.

It is an arithmetic number, because the mean of its divisors is an integer number (36765).

2¹²²⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

122545 is a deficient number, since it is larger than the sum of its proper divisors (24515).

122545 is an equidigital number, since it uses as much as digits as its factorization.

122545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24514.

The product of its digits is 400, while the sum is 19.

The square root of 122545 is about 350.0642798116. The cubic root of 122545 is about 49.6705000319.

Adding to 122545 its reverse (545221), we get a palindrome (667766).

The spelling of 122545 in words is "one hundred twenty-two thousand, five hundred forty-five".