421602720 has 576 divisors, whose sum is σ = 1795385088. Its totient is φ = 81100800.

The previous prime is 421602691. The next prime is 421602773. The reversal of 421602720 is 27206124.

It is a super-2 number, since 2×421602720² = 355497707022796800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6911490 + ... + 6911550.

It is an arithmetic number, because the mean of its divisors is an integer number (3116988).

Almost surely, 2^421602720 is an apocalyptic number.

421602720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421602720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897692544).

421602720 is an abundant number, since it is smaller than the sum of its proper divisors (1373782368).

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

421602720 is a wasteful number, since it uses less digits than its factorization.

421602720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 421602720 is about 20532.9666633928. The cubic root of 421602720 is about 749.8386141642.

Adding to 421602720 its reverse (27206124), we get a palindrome (448808844).

The spelling of 421602720 in words is "four hundred twenty-one million, six hundred two thousand, seven hundred twenty".