103720261 has 2 divisors, whose sum is σ = 103720262. Its totient is φ = 103720260.

The previous prime is 103720229. The next prime is 103720273. The reversal of 103720261 is 162027301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102921025 + 799236 = 10145^2 + 894^2 .

It is a cyclic number.

It is not a de Polignac number, because 103720261 - 2⁵ = 103720229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103720291) 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, 51860130 + 51860131.

It is an arithmetic number, because the mean of its divisors is an integer number (51860131).

Almost surely, 2^103720261 is an apocalyptic number.

It is an amenable number.

103720261 is a deficient number, since it is larger than the sum of its proper divisors (1).

103720261 is an equidigital number, since it uses as much as digits as its factorization.

103720261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 103720261 is about 10184.3144590100. The cubic root of 103720261 is about 469.8449179004.

Adding to 103720261 its reverse (162027301), we get a palindrome (265747562).

The spelling of 103720261 in words is "one hundred three million, seven hundred twenty thousand, two hundred sixty-one".