1440420401 has 8 divisors (see below), whose sum is σ = 1702960320. Its totient is φ = 1192071888.

The previous prime is 1440420341. The next prime is 1440420403. The reversal of 1440420401 is 1040240441.

It is a happy number.

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

It is not a de Polignac number, because 1440420401 - 2¹⁰ = 1440419377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440420403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3547631 + ... + 3548036.

It is an arithmetic number, because the mean of its divisors is an integer number (212870040).

Almost surely, 2^1440420401 is an apocalyptic number.

It is an amenable number.

1440420401 is a deficient number, since it is larger than the sum of its proper divisors (262539919).

1440420401 is an equidigital number, since it uses as much as digits as its factorization.

1440420401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7095703.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1440420401 is about 37952.8707873331. The cubic root of 1440420401 is about 1129.3531163224.

Adding to 1440420401 its reverse (1040240441), we get a palindrome (2480660842).

The spelling of 1440420401 in words is "one billion, four hundred forty million, four hundred twenty thousand, four hundred one".