1040004001 has 4 divisors (see below), whose sum is σ = 1059626772. Its totient is φ = 1020381232.

The previous prime is 1040003999. The next prime is 1040004013. The reversal of 1040004001 is 1004000401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1004000401 = 5693 ⋅176357.

It can be written as a sum of positive squares in 2 ways, for example, as 295805601 + 744198400 = 17199^2 + 27280^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040004001 - 2¹ = 1040003999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1040004101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9811306 + ... + 9811411.

It is an arithmetic number, because the mean of its divisors is an integer number (264906693).

Almost surely, 2^1040004001 is an apocalyptic number.

It is an amenable number.

1040004001 is a deficient number, since it is larger than the sum of its proper divisors (19622771).

1040004001 is an equidigital number, since it uses as much as digits as its factorization.

1040004001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19622770.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1040004001 is about 32249.0930260062. The cubic root of 1040004001 is about 1013.1607030656.

Adding to 1040004001 its reverse (1004000401), we get a palindrome (2044004402).

It can be divided in two parts, 104000400 and 1, that added together give a palindrome (104000401).

The spelling of 1040004001 in words is "one billion, forty million, four thousand, one".