1005144401 has 4 divisors (see below), whose sum is σ = 1008696432. Its totient is φ = 1001592372.

The previous prime is 1005144391. The next prime is 1005144409. The reversal of 1005144401 is 1044415001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005144401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1005144409) 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, 1775591 + ... + 1776156.

It is an arithmetic number, because the mean of its divisors is an integer number (252174108).

Almost surely, 2^1005144401 is an apocalyptic number.

It is an amenable number.

1005144401 is a deficient number, since it is larger than the sum of its proper divisors (3552031).

1005144401 is an equidigital number, since it uses as much as digits as its factorization.

1005144401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552030.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1005144401 is about 31704.0123801389. The cubic root of 1005144401 is about 1001.7118681685.

Adding to 1005144401 its reverse (1044415001), we get a palindrome (2049559402).

The spelling of 1005144401 in words is "one billion, five million, one hundred forty-four thousand, four hundred one".