421320323025 has 72 divisors (see below), whose sum is σ = 868731611904. Its totient is φ = 191197612800.

The previous prime is 421320323023. The next prime is 421320323119. The reversal of 421320323025 is 520323023124.

421320323025 is a `hidden beast` number, since 4 + 2 + 1 + 320 + 32 + 302 + 5 = 666.

It is not a de Polignac number, because 421320323025 - 2¹ = 421320323023 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 421320323025.

It is not an unprimeable number, because it can be changed into a prime (421320323023) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 760521 + ... + 1192070.

It is an arithmetic number, because the mean of its divisors is an integer number (12065716832).

Almost surely, 2^421320323025 is an apocalyptic number.

421320323025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421320323025 is an abundant number, since it is smaller than the sum of its proper divisors (447411288879).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421320323025 is a wasteful number, since it uses less digits than its factorization.

421320323025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952751 (or 1952743 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 421320323025 its reverse (520323023124), we get a palindrome (941643346149).

The spelling of 421320323025 in words is "four hundred twenty-one billion, three hundred twenty million, three hundred twenty-three thousand, twenty-five".