123542501 has 2 divisors, whose sum is σ = 123542502. Its totient is φ = 123542500.

The previous prime is 123542477. The next prime is 123542543. The reversal of 123542501 is 105245321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100020001 + 23522500 = 10001^2 + 4850^2 .

It is a cyclic number.

It is not a de Polignac number, because 123542501 - 2⁶ = 123542437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123542701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61771250 + 61771251.

It is an arithmetic number, because the mean of its divisors is an integer number (61771251).

Almost surely, 2^123542501 is an apocalyptic number.

It is an amenable number.

123542501 is a deficient number, since it is larger than the sum of its proper divisors (1).

123542501 is an equidigital number, since it uses as much as digits as its factorization.

123542501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 123542501 is about 11114.9674313513. The cubic root of 123542501 is about 498.0490656107.

Adding to 123542501 its reverse (105245321), we get a palindrome (228787822).

The spelling of 123542501 in words is "one hundred twenty-three million, five hundred forty-two thousand, five hundred one".