421745625 has 60 divisors (see below), whose sum is σ = 870071488. Its totient is φ = 192780000.

The previous prime is 421745587. The next prime is 421745627. The reversal of 421745625 is 526547124.

It is a happy number.

421745625 is a `hidden beast` number, since 4 + 21 + 7 + 4 + 5 + 625 = 666.

It is not a de Polignac number, because 421745625 - 2⁷ = 421745497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421745625.

It is not an unprimeable number, because it can be changed into a prime (421745627) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 34020 + ... + 44730.

Almost surely, 2^421745625 is an apocalyptic number.

421745625 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421745625 is an abundant number, since it is smaller than the sum of its proper divisors (448325863).

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

421745625 is a wasteful number, since it uses less digits than its factorization.

421745625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10744 (or 10726 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 421745625 is about 20536.4462602467. The cubic root of 421745625 is about 749.9233254950.

The spelling of 421745625 in words is "four hundred twenty-one million, seven hundred forty-five thousand, six hundred twenty-five".