100432261 has 2 divisors, whose sum is σ = 100432262. Its totient is φ = 100432260.

The previous prime is 100432231. The next prime is 100432303. The reversal of 100432261 is 162234001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68724100 + 31708161 = 8290^2 + 5631^2 .

It is a cyclic number.

It is not a de Polignac number, because 100432261 - 2⁵ = 100432229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100432201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50216130 + 50216131.

It is an arithmetic number, because the mean of its divisors is an integer number (50216131).

Almost surely, 2^100432261 is an apocalyptic number.

It is an amenable number.

100432261 is a deficient number, since it is larger than the sum of its proper divisors (1).

100432261 is an equidigital number, since it uses as much as digits as its factorization.

100432261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 100432261 is about 10021.5897441474. The cubic root of 100432261 is about 464.8267146358.

Adding to 100432261 its reverse (162234001), we get a palindrome (262666262).

The spelling of 100432261 in words is "one hundred million, four hundred thirty-two thousand, two hundred sixty-one".