122345261 has 2 divisors, whose sum is σ = 122345262. Its totient is φ = 122345260.

The previous prime is 122345231. The next prime is 122345263. The reversal of 122345261 is 162543221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72148036 + 50197225 = 8494^2 + 7085^2 .

It is an emirp because it is prime and its reverse (162543221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122345261 - 2²² = 118150957 is a prime.

Together with 122345263, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122345261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122345263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61172630 + 61172631.

It is an arithmetic number, because the mean of its divisors is an integer number (61172631).

Almost surely, 2^122345261 is an apocalyptic number.

It is an amenable number.

122345261 is a deficient number, since it is larger than the sum of its proper divisors (1).

122345261 is an equidigital number, since it uses as much as digits as its factorization.

122345261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

The square root of 122345261 is about 11060.9792062005. The cubic root of 122345261 is about 496.4349898165.

Adding to 122345261 its reverse (162543221), we get a palindrome (284888482).

The spelling of 122345261 in words is "one hundred twenty-two million, three hundred forty-five thousand, two hundred sixty-one".