420413044251421 has 16 divisors (see below), whose sum is σ = 479576534540544. Its totient is φ = 365099798041344.

The previous prime is 420413044251407. The next prime is 420413044251427. The reversal of 420413044251421 is 124152440314024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 420413044251421 - 2⁹ = 420413044250909 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 (420413044251427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379455121 + ... + 380561446.

It is an arithmetic number, because the mean of its divisors is an integer number (29973533408784).

Almost surely, 2^{420413044251421} is an apocalyptic number.

It is an amenable number.

420413044251421 is a deficient number, since it is larger than the sum of its proper divisors (59163490289123).

420413044251421 is a wasteful number, since it uses less digits than its factorization.

420413044251421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760019100.

The product of its (nonzero) digits is 122880, while the sum is 37.

Adding to 420413044251421 its reverse (124152440314024), we get a palindrome (544565484565445).

The spelling of 420413044251421 in words is "four hundred twenty trillion, four hundred thirteen billion, forty-four million, two hundred fifty-one thousand, four hundred twenty-one".