420400443134401 has 4 divisors (see below), whose sum is σ = 420400615252912. Its totient is φ = 420400271015892.

The previous prime is 420400443134377. The next prime is 420400443134437. The reversal of 420400443134401 is 104431344004024.

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 420400443134401 - 2⁵ = 420400443134369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420400443134461) 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, 82341975 + ... + 87298348.

It is an arithmetic number, because the mean of its divisors is an integer number (105100153813228).

Almost surely, 2^{420400443134401} is an apocalyptic number.

It is an amenable number.

420400443134401 is a deficient number, since it is larger than the sum of its proper divisors (172118511).

420400443134401 is a wasteful number, since it uses less digits than its factorization.

420400443134401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172118510.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 420400443134401 its reverse (104431344004024), we get a palindrome (524831787138425).

The spelling of 420400443134401 in words is "four hundred twenty trillion, four hundred billion, four hundred forty-three million, one hundred thirty-four thousand, four hundred one".