421052445 has 64 divisors (see below), whose sum is σ = 859622400. Its totient is φ = 193389120.

The previous prime is 421052419. The next prime is 421052449. The reversal of 421052445 is 544250124.

421052445 is a `hidden beast` number, since 4 + 210 + 5 + 2 + 445 = 666.

It is not a de Polignac number, because 421052445 - 2⁶ = 421052381 is a prime.

It is a super-2 number, since 2×421052445² = 354570322880956050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421052449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20754 + ... + 35676.

It is an arithmetic number, because the mean of its divisors is an integer number (13431600).

Almost surely, 2^421052445 is an apocalyptic number.

421052445 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421052445 is an abundant number, since it is smaller than the sum of its proper divisors (438569955).

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

421052445 is a wasteful number, since it uses less digits than its factorization.

421052445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14967 (or 14961 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 421052445 is about 20519.5624953360. The cubic root of 421052445 is about 749.5122428594.

The spelling of 421052445 in words is "four hundred twenty-one million, fifty-two thousand, four hundred forty-five".