420521400413 has 4 divisors (see below), whose sum is σ = 420679553280. Its totient is φ = 420363247548.

The previous prime is 420521400407. The next prime is 420521400461. The reversal of 420521400413 is 314004125024.

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 420521400413 - 2⁸ = 420521400157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420521400613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79072445 + ... + 79077762.

It is an arithmetic number, because the mean of its divisors is an integer number (105169888320).

Almost surely, 2^420521400413 is an apocalyptic number.

It is an amenable number.

420521400413 is a deficient number, since it is larger than the sum of its proper divisors (158152867).

420521400413 is a wasteful number, since it uses less digits than its factorization.

420521400413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158152866.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 420521400413 its reverse (314004125024), we get a palindrome (734525525437).

The spelling of 420521400413 in words is "four hundred twenty billion, five hundred twenty-one million, four hundred thousand, four hundred thirteen".