122651 has 2 divisors, whose sum is σ = 122652. Its totient is φ = 122650.
The previous prime is 122611. The next prime is 122653. The reversal of 122651 is 156221.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-122651 is a prime.
Together with 122653, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (122653) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61325 + 61326.
It is an arithmetic number, because the mean of its divisors is an integer number (61326).
2122651 is an apocalyptic number.
122651 is a deficient number, since it is larger than the sum of its proper divisors (1).
122651 is an equidigital number, since it uses as much as digits as its factorization.
122651 is an evil number, because the sum of its binary digits is even.
The product of its digits is 120, while the sum is 17.
The square root of 122651 is about 350.2156478514. The cubic root of 122651 is about 49.6848173729.
Adding to 122651 its reverse (156221), we get a palindrome (278872).
It can be divided in two parts, 1226 and 51, that multiplied together give a palindrome (62526).
The spelling of 122651 in words is "one hundred twenty-two thousand, six hundred fifty-one".
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