101243501 has 2 divisors, whose sum is σ = 101243502. Its totient is φ = 101243500.

The previous prime is 101243479. The next prime is 101243521. The reversal of 101243501 is 105342101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101022601 + 220900 = 10051^2 + 470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101243501 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 101243501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101243521) 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, 50621750 + 50621751.

It is an arithmetic number, because the mean of its divisors is an integer number (50621751).

Almost surely, 2^101243501 is an apocalyptic number.

It is an amenable number.

101243501 is a deficient number, since it is larger than the sum of its proper divisors (1).

101243501 is an equidigital number, since it uses as much as digits as its factorization.

101243501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 101243501 is about 10061.9829556604. The cubic root of 101243501 is about 466.0749033814.

Adding to 101243501 its reverse (105342101), we get a palindrome (206585602).

The spelling of 101243501 in words is "one hundred one million, two hundred forty-three thousand, five hundred one".