122557481 has 2 divisors, whose sum is σ = 122557482. Its totient is φ = 122557480.

The previous prime is 122557447. The next prime is 122557493. The reversal of 122557481 is 184755221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111936400 + 10621081 = 10580^2 + 3259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122557481 is a prime.

It is a super-2 number, since 2×122557481² = 30040672298130722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122557411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61278740 + 61278741.

It is an arithmetic number, because the mean of its divisors is an integer number (61278741).

Almost surely, 2^122557481 is an apocalyptic number.

It is an amenable number.

122557481 is a deficient number, since it is larger than the sum of its proper divisors (1).

122557481 is an equidigital number, since it uses as much as digits as its factorization.

122557481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22400, while the sum is 35.

The square root of 122557481 is about 11070.5682329319. The cubic root of 122557481 is about 496.7218626003.

The spelling of 122557481 in words is "one hundred twenty-two million, five hundred fifty-seven thousand, four hundred eighty-one".