4240401423421 has 4 divisors (see below), whose sum is σ = 4377188566144. Its totient is φ = 4103614280700.

The previous prime is 4240401423343. The next prime is 4240401423437. The reversal of 4240401423421 is 1243241040424.

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 4240401423421 - 2²⁷ = 4240267205693 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 136787142691 = 4240401423421 / (4 + 2 + 4 + 0 + 4 + 0 + 1 + 4 + 2 + 3 + 4 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4240401424421) 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, 68393571315 + ... + 68393571376.

It is an arithmetic number, because the mean of its divisors is an integer number (1094297141536).

Almost surely, 2^{4240401423421} is an apocalyptic number.

It is an amenable number.

4240401423421 is a deficient number, since it is larger than the sum of its proper divisors (136787142723).

4240401423421 is a wasteful number, since it uses less digits than its factorization.

4240401423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136787142722.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 4240401423421 its reverse (1243241040424), we get a palindrome (5483642463845).

The spelling of 4240401423421 in words is "four trillion, two hundred forty billion, four hundred one million, four hundred twenty-three thousand, four hundred twenty-one".