1404243121 has 4 divisors (see below), whose sum is σ = 1405043200. Its totient is φ = 1403443044.

The previous prime is 1404243083. The next prime is 1404243149. The reversal of 1404243121 is 1213424041.

It is a happy number.

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 not a de Polignac number, because 1404243121 - 2¹³ = 1404234929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1404243092 and 1404243101.

It is not an unprimeable number, because it can be changed into a prime (1404243161) 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, 397401 + ... + 400918.

It is an arithmetic number, because the mean of its divisors is an integer number (351260800).

Almost surely, 2^1404243121 is an apocalyptic number.

It is an amenable number.

1404243121 is a deficient number, since it is larger than the sum of its proper divisors (800079).

1404243121 is an equidigital number, since it uses as much as digits as its factorization.

1404243121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800078.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 1404243121 is about 37473.2320596983. The cubic root of 1404243121 is about 1119.8179766371.

Adding to 1404243121 its reverse (1213424041), we get a palindrome (2617667162).

The spelling of 1404243121 in words is "one billion, four hundred four million, two hundred forty-three thousand, one hundred twenty-one".