104020251 has 4 divisors (see below), whose sum is σ = 138693672. Its totient is φ = 69346832.

The previous prime is 104020223. The next prime is 104020261. The reversal of 104020251 is 152020401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 104020251 - 2⁵ = 104020219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 104020251.

It is not an unprimeable number, because it can be changed into a prime (104020211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17336706 + ... + 17336711.

It is an arithmetic number, because the mean of its divisors is an integer number (34673418).

Almost surely, 2^104020251 is an apocalyptic number.

104020251 is a deficient number, since it is larger than the sum of its proper divisors (34673421).

104020251 is an equidigital number, since it uses as much as digits as its factorization.

104020251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34673420.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 104020251 is about 10199.0318658194. The cubic root of 104020251 is about 470.2974592034.

Adding to 104020251 its reverse (152020401), we get a palindrome (256040652).

The spelling of 104020251 in words is "one hundred four million, twenty thousand, two hundred fifty-one".