100641405 has 16 divisors (see below), whose sum is σ = 162258624. Its totient is φ = 53264640.

The previous prime is 100641389. The next prime is 100641419. The reversal of 100641405 is 504146001.

It is not a de Polignac number, because 100641405 - 2⁴ = 100641389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23644 + ... + 27573.

It is an arithmetic number, because the mean of its divisors is an integer number (10141164).

Almost surely, 2^100641405 is an apocalyptic number.

100641405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100641405 is a deficient number, since it is larger than the sum of its proper divisors (61617219).

100641405 is a wasteful number, since it uses less digits than its factorization.

100641405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51356.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 100641405 is about 10032.0189892165. The cubic root of 100641405 is about 465.1491485944.

Adding to 100641405 its reverse (504146001), we get a palindrome (604787406).

The spelling of 100641405 in words is "one hundred million, six hundred forty-one thousand, four hundred five".