122900257 has 2 divisors, whose sum is σ = 122900258. Its totient is φ = 122900256.

The previous prime is 122900251. The next prime is 122900291. The reversal of 122900257 is 752009221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84658401 + 38241856 = 9201^2 + 6184^2 .

It is a cyclic number.

It is not a de Polignac number, because 122900257 - 2³ = 122900249 is a prime.

It is not a weakly prime, because it can be changed into another prime (122900251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61450128 + 61450129.

It is an arithmetic number, because the mean of its divisors is an integer number (61450129).

Almost surely, 2^122900257 is an apocalyptic number.

It is an amenable number.

122900257 is a deficient number, since it is larger than the sum of its proper divisors (1).

122900257 is an equidigital number, since it uses as much as digits as its factorization.

122900257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 122900257 is about 11086.0388326940. The cubic root of 122900257 is about 497.1845185526.

Adding to 122900257 its reverse (752009221), we get a palindrome (874909478).

The spelling of 122900257 in words is "one hundred twenty-two million, nine hundred thousand, two hundred fifty-seven".