100025641 has 2 divisors, whose sum is σ = 100025642. Its totient is φ = 100025640.

The previous prime is 100025621. The next prime is 100025663. The reversal of 100025641 is 146520001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99920016 + 105625 = 9996^2 + 325^2 .

It is a cyclic number.

It is not a de Polignac number, because 100025641 - 2²³ = 91637033 is a prime.

100025641 is a modest number, since divided by 25641 gives 100 as remainder.

It is not a weakly prime, because it can be changed into another prime (100025621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50012820 + 50012821.

It is an arithmetic number, because the mean of its divisors is an integer number (50012821).

Almost surely, 2^100025641 is an apocalyptic number.

It is an amenable number.

100025641 is a deficient number, since it is larger than the sum of its proper divisors (1).

100025641 is an equidigital number, since it uses as much as digits as its factorization.

100025641 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 100025641 is about 10001.2819678279. The cubic root of 100025641 is about 464.1985516308.

Adding to 100025641 its reverse (146520001), we get a palindrome (246545642).

The spelling of 100025641 in words is "one hundred million, twenty-five thousand, six hundred forty-one".