100045261 has 2 divisors, whose sum is σ = 100045262. Its totient is φ = 100045260.

The previous prime is 100045249. The next prime is 100045313. The reversal of 100045261 is 162540001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83997225 + 16048036 = 9165^2 + 4006^2 .

It is a cyclic number.

It is not a de Polignac number, because 100045261 - 2⁵ = 100045229 is a prime.

It is a super-3 number, since 3×100045261³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100048261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50022630 + 50022631.

It is an arithmetic number, because the mean of its divisors is an integer number (50022631).

Almost surely, 2^100045261 is an apocalyptic number.

It is an amenable number.

100045261 is a deficient number, since it is larger than the sum of its proper divisors (1).

100045261 is an equidigital number, since it uses as much as digits as its factorization.

100045261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 100045261 is about 10002.2627939882. The cubic root of 100045261 is about 464.2289004496.

Adding to 100045261 its reverse (162540001), we get a palindrome (262585262).

The spelling of 100045261 in words is "one hundred million, forty-five thousand, two hundred sixty-one".