122909261 has 2 divisors, whose sum is σ = 122909262. Its totient is φ = 122909260.

The previous prime is 122909243. The next prime is 122909287. The reversal of 122909261 is 162909221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119486761 + 3422500 = 10931^2 + 1850^2 .

It is an emirp because it is prime and its reverse (162909221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122909261 - 2⁶ = 122909197 is a prime.

It is a super-2 number, since 2×122909261² = 30213372879132242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122906261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61454630 + 61454631.

It is an arithmetic number, because the mean of its divisors is an integer number (61454631).

Almost surely, 2^122909261 is an apocalyptic number.

It is an amenable number.

122909261 is a deficient number, since it is larger than the sum of its proper divisors (1).

122909261 is an equidigital number, since it uses as much as digits as its factorization.

122909261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 122909261 is about 11086.4449216149. Note that the first 3 decimals coincide. The cubic root of 122909261 is about 497.1966599433.

The spelling of 122909261 in words is "one hundred twenty-two million, nine hundred nine thousand, two hundred sixty-one".