421725213 has 36 divisors (see below), whose sum is σ = 763132188. Its totient is φ = 222445440.

The previous prime is 421725211. The next prime is 421725229. The reversal of 421725213 is 312527124.

421725213 is a `hidden beast` number, since 421 + 7 + 25 + 213 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 50083929 + 371641284 = 7077^2 + 19278^2 .

It is not a de Polignac number, because 421725213 - 2¹ = 421725211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421725211) 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 35 ways as a sum of consecutive naturals, for example, 31048 + ... + 42513.

Almost surely, 2^421725213 is an apocalyptic number.

It is an amenable number.

421725213 is a deficient number, since it is larger than the sum of its proper divisors (341406975).

421725213 is a wasteful number, since it uses less digits than its factorization.

421725213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73594 (or 73584 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 421725213 is about 20535.9492841212. The cubic root of 421725213 is about 749.9112268262.

The spelling of 421725213 in words is "four hundred twenty-one million, seven hundred twenty-five thousand, two hundred thirteen".