421730701 has 18 divisors (see below), whose sum is σ = 496853610. Its totient is φ = 356892480.

The previous prime is 421730693. The next prime is 421730711. The reversal of 421730701 is 107037124.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 164096100 + 257634601 = 12810^2 + 16051^2 .

It is not a de Polignac number, because 421730701 - 2³ = 421730693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421730711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1500681 + ... + 1500961.

Almost surely, 2^421730701 is an apocalyptic number.

It is an amenable number.

421730701 is a deficient number, since it is larger than the sum of its proper divisors (75122909).

421730701 is an equidigital number, since it uses as much as digits as its factorization.

421730701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 421730701 is about 20536.0829030271. The cubic root of 421730701 is about 749.9144797302.

Adding to 421730701 its reverse (107037124), we get a palindrome (528767825).

The spelling of 421730701 in words is "four hundred twenty-one million, seven hundred thirty thousand, seven hundred one".