100403001 has 6 divisors (see below), whose sum is σ = 145026570. Its totient is φ = 66935328.

The previous prime is 100402999. The next prime is 100403029. The reversal of 100403001 is 100304001.

It can be written as a sum of positive squares in only one way, i.e., 100400400 + 2601 = 10020^2 + 51^2 .

It is not a de Polignac number, because 100403001 - 2¹ = 100402999 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: 11155889 = 100403001 / (1 + 0 + 0 + 4 + 0 + 3 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (100403701) 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, 5577936 + ... + 5577953.

It is an arithmetic number, because the mean of its divisors is an integer number (24171095).

Almost surely, 2^100403001 is an apocalyptic number.

It is an amenable number.

100403001 is a deficient number, since it is larger than the sum of its proper divisors (44623569).

100403001 is a wasteful number, since it uses less digits than its factorization.

100403001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11155895 (or 11155892 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 100403001 is about 10020.1297895786. The cubic root of 100403001 is about 464.7815692792.

Adding to 100403001 its reverse (100304001), we get a palindrome (200707002).

It can be divided in two parts, 10040 and 3001, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 100403001 in words is "one hundred million, four hundred three thousand, one".