421389570 has 64 divisors (see below), whose sum is σ = 1163264256. Its totient is φ = 95696640.

The previous prime is 421389569. The next prime is 421389571. The reversal of 421389570 is 75983124.

It is an interprime number because it is at equal distance from previous prime (421389569) and next prime (421389571).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421389571) 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 31 ways as a sum of consecutive naturals, for example, 26580 + ... + 39360.

It is an arithmetic number, because the mean of its divisors is an integer number (18176004).

Almost surely, 2^421389570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421389570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (581632128).

421389570 is an abundant number, since it is smaller than the sum of its proper divisors (741874686).

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

421389570 is a wasteful number, since it uses less digits than its factorization.

421389570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12955.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 421389570 is about 20527.7755735978. The cubic root of 421389570 is about 749.7122273745.

The spelling of 421389570 in words is "four hundred twenty-one million, three hundred eighty-nine thousand, five hundred seventy".