123761257 has 2 divisors, whose sum is σ = 123761258. Its totient is φ = 123761256.

The previous prime is 123761243. The next prime is 123761273. The reversal of 123761257 is 752167321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95628841 + 28132416 = 9779^2 + 5304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123761257 is a prime.

It is not a weakly prime, because it can be changed into another prime (123761227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61880628 + 61880629.

It is an arithmetic number, because the mean of its divisors is an integer number (61880629).

Almost surely, 2^123761257 is an apocalyptic number.

It is an amenable number.

123761257 is a deficient number, since it is larger than the sum of its proper divisors (1).

123761257 is an equidigital number, since it uses as much as digits as its factorization.

123761257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 34.

The square root of 123761257 is about 11124.8036836611. The cubic root of 123761257 is about 498.3428564850.

The spelling of 123761257 in words is "one hundred twenty-three million, seven hundred sixty-one thousand, two hundred fifty-seven".