421300544261 has 4 divisors (see below), whose sum is σ = 422821485132. Its totient is φ = 419779603392.

The previous prime is 421300544251. The next prime is 421300544281. The reversal of 421300544261 is 162445003124.

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 149266322500 + 272034221761 = 386350^2 + 521569^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421300544261 is a prime.

It is a super-2 number, since 2×421300544261² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421300544251) 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, 760470020 + ... + 760470573.

It is an arithmetic number, because the mean of its divisors is an integer number (105705371283).

Almost surely, 2^421300544261 is an apocalyptic number.

It is an amenable number.

421300544261 is a deficient number, since it is larger than the sum of its proper divisors (1520940871).

421300544261 is a wasteful number, since it uses less digits than its factorization.

421300544261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520940870.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 421300544261 its reverse (162445003124), we get a palindrome (583745547385).

The spelling of 421300544261 in words is "four hundred twenty-one billion, three hundred million, five hundred forty-four thousand, two hundred sixty-one".