420353142621 has 4 divisors (see below), whose sum is σ = 560470856832. Its totient is φ = 280235428412.

The previous prime is 420353142613. The next prime is 420353142623. The reversal of 420353142621 is 126241353024.

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 420353142621 - 2³ = 420353142613 is a prime.

It is a super-2 number, since 2×420353142621² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420353142623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70058857101 + ... + 70058857106.

It is an arithmetic number, because the mean of its divisors is an integer number (140117714208).

Almost surely, 2^420353142621 is an apocalyptic number.

It is an amenable number.

420353142621 is a deficient number, since it is larger than the sum of its proper divisors (140117714211).

420353142621 is a wasteful number, since it uses less digits than its factorization.

420353142621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140117714210.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 420353142621 its reverse (126241353024), we get a palindrome (546594495645).

The spelling of 420353142621 in words is "four hundred twenty billion, three hundred fifty-three million, one hundred forty-two thousand, six hundred twenty-one".