122542961 has 4 divisors (see below), whose sum is σ = 124551924. Its totient is φ = 120534000.

The previous prime is 122542949. The next prime is 122542967. The reversal of 122542961 is 169245221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169245221 = 239 ⋅708139.

It can be written as a sum of positive squares in 2 ways, for example, as 17172736 + 105370225 = 4144^2 + 10265^2 .

It is a cyclic number.

It is not a de Polignac number, because 122542961 - 2¹⁸ = 122280817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122542967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004390 + ... + 1004511.

It is an arithmetic number, because the mean of its divisors is an integer number (31137981).

Almost surely, 2^122542961 is an apocalyptic number.

It is an amenable number.

122542961 is a deficient number, since it is larger than the sum of its proper divisors (2008963).

122542961 is an equidigital number, since it uses as much as digits as its factorization.

122542961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008962.

The product of its digits is 8640, while the sum is 32.

The square root of 122542961 is about 11069.9124206111. The cubic root of 122542961 is about 496.7022454481.

The spelling of 122542961 in words is "one hundred twenty-two million, five hundred forty-two thousand, nine hundred sixty-one".