1404240121 has 4 divisors (see below), whose sum is σ = 1436896912. Its totient is φ = 1371583332.

The previous prime is 1404240109. The next prime is 1404240127. The reversal of 1404240121 is 1210424041.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1210424041 = 47 ⋅25753703.

It is a cyclic number.

It is not a de Polignac number, because 1404240121 - 2²⁵ = 1370685689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1404240127) 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, 16328331 + ... + 16328416.

It is an arithmetic number, because the mean of its divisors is an integer number (359224228).

Almost surely, 2^1404240121 is an apocalyptic number.

It is an amenable number.

1404240121 is a deficient number, since it is larger than the sum of its proper divisors (32656791).

1404240121 is an equidigital number, since it uses as much as digits as its factorization.

1404240121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32656790.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1404240121 is about 37473.1920311040. The cubic root of 1404240121 is about 1119.8171791835.

Adding to 1404240121 its reverse (1210424041), we get a palindrome (2614664162).

The spelling of 1404240121 in words is "one billion, four hundred four million, two hundred forty thousand, one hundred twenty-one".