1405404401 has 4 divisors (see below), whose sum is σ = 1405522404. Its totient is φ = 1405286400.

The previous prime is 1405404361. The next prime is 1405404421. The reversal of 1405404401 is 1044045041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 274763776 + 1130640625 = 16576^2 + 33625^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405404401 - 2¹⁸ = 1405142257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1405404421) 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, 38840 + ... + 65721.

It is an arithmetic number, because the mean of its divisors is an integer number (351380601).

Almost surely, 2^1405404401 is an apocalyptic number.

It is an amenable number.

1405404401 is a deficient number, since it is larger than the sum of its proper divisors (118003).

1405404401 is a wasteful number, since it uses less digits than its factorization.

1405404401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118002.

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

The square root of 1405404401 is about 37488.7236512528. The cubic root of 1405404401 is about 1120.1265803471.

Adding to 1405404401 its reverse (1044045041), we get a palindrome (2449449442).

The spelling of 1405404401 in words is "one billion, four hundred five million, four hundred four thousand, four hundred one".