104001021 has 6 divisors (see below), whose sum is σ = 150223710. Its totient is φ = 69334008.

The previous prime is 104001017. The next prime is 104001059. The reversal of 104001021 is 120100401.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71064900 + 32936121 = 8430^2 + 5739^2 .

It is not a de Polignac number, because 104001021 - 2² = 104001017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 11555669 = 104001021 / (1 + 0 + 4 + 0 + 0 + 1 + 0 + 2 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 104000994 and 104001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104001091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5777826 + ... + 5777843.

It is an arithmetic number, because the mean of its divisors is an integer number (25037285).

Almost surely, 2^104001021 is an apocalyptic number.

It is an amenable number.

104001021 is a deficient number, since it is larger than the sum of its proper divisors (46222689).

104001021 is a wasteful number, since it uses less digits than its factorization.

104001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11555675 (or 11555672 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 104001021 is about 10198.0890857062. The cubic root of 104001021 is about 470.2684764575.

Adding to 104001021 its reverse (120100401), we get a palindrome (224101422).

The spelling of 104001021 in words is "one hundred four million, one thousand, twenty-one".