103901521 has 2 divisors, whose sum is σ = 103901522. Its totient is φ = 103901520.

The previous prime is 103901489. The next prime is 103901531. The reversal of 103901521 is 125109301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85100625 + 18800896 = 9225^2 + 4336^2 .

It is a cyclic number.

It is not a de Polignac number, because 103901521 - 2⁵ = 103901489 is a prime.

It is a super-2 number, since 2×103901521² = 21591052132226882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 103901492 and 103901501.

It is not a weakly prime, because it can be changed into another prime (103901531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51950760 + 51950761.

It is an arithmetic number, because the mean of its divisors is an integer number (51950761).

Almost surely, 2^103901521 is an apocalyptic number.

It is an amenable number.

103901521 is a deficient number, since it is larger than the sum of its proper divisors (1).

103901521 is an equidigital number, since it uses as much as digits as its factorization.

103901521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 103901521 is about 10193.2095534233. The cubic root of 103901521 is about 470.1184566369.

It can be divided in two parts, 10390 and 1521, that added together give a palindrome (11911).

The spelling of 103901521 in words is "one hundred three million, nine hundred one thousand, five hundred twenty-one".