4123401421 has 4 divisors (see below), whose sum is σ = 4165910812. Its totient is φ = 4080892032.

The previous prime is 4123401367. The next prime is 4123401427. The reversal of 4123401421 is 1241043214.

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 3201975396 + 921426025 = 56586^2 + 30355^2 .

It is a cyclic number.

It is not a de Polignac number, because 4123401421 - 2¹⁵ = 4123368653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4123401392 and 4123401401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4123401427) 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, 21254550 + ... + 21254743.

It is an arithmetic number, because the mean of its divisors is an integer number (1041477703).

Almost surely, 2^4123401421 is an apocalyptic number.

It is an amenable number.

4123401421 is a deficient number, since it is larger than the sum of its proper divisors (42509391).

4123401421 is an equidigital number, since it uses as much as digits as its factorization.

4123401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42509390.

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

The square root of 4123401421 is about 64213.7167667470. The cubic root of 4123401421 is about 1603.5599666333.

Adding to 4123401421 its reverse (1241043214), we get a palindrome (5364444635).

The spelling of 4123401421 in words is "four billion, one hundred twenty-three million, four hundred one thousand, four hundred twenty-one".