122155457 has 2 divisors, whose sum is σ = 122155458. Its totient is φ = 122155456.

The previous prime is 122155433. The next prime is 122155483. The reversal of 122155457 is 754551221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121859521 + 295936 = 11039^2 + 544^2 .

It is an emirp because it is prime and its reverse (754551221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122155457 - 2¹⁸ = 121893313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (122155417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61077728 + 61077729.

It is an arithmetic number, because the mean of its divisors is an integer number (61077729).

Almost surely, 2^122155457 is an apocalyptic number.

It is an amenable number.

122155457 is a deficient number, since it is larger than the sum of its proper divisors (1).

122155457 is an equidigital number, since it uses as much as digits as its factorization.

122155457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14000, while the sum is 32.

The square root of 122155457 is about 11052.3959845818. The cubic root of 122155457 is about 496.1781371616.

The spelling of 122155457 in words is "one hundred twenty-two million, one hundred fifty-five thousand, four hundred fifty-seven".