1044540401 has 8 divisors (see below), whose sum is σ = 1118412360. Its totient is φ = 972049408.

The previous prime is 1044540389. The next prime is 1044540457. The reversal of 1044540401 is 1040454401.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 433264225 + 611276176 = 20815^2 + 24724^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1044540401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1044540491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343676 + ... + 346701.

It is an arithmetic number, because the mean of its divisors is an integer number (139801545).

Almost surely, 2^1044540401 is an apocalyptic number.

It is an amenable number.

1044540401 is a deficient number, since it is larger than the sum of its proper divisors (73871959).

1044540401 is an equidigital number, since it uses as much as digits as its factorization.

1044540401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690483.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1044540401 is about 32319.3502564640. The cubic root of 1044540401 is about 1014.6316704102.

Adding to 1044540401 its reverse (1040454401), we get a palindrome (2084994802).

The spelling of 1044540401 in words is "one billion, forty-four million, five hundred forty thousand, four hundred one".