421012620 has 192 divisors, whose sum is σ = 1510440960. Its totient is φ = 95364864.

The previous prime is 421012619. The next prime is 421012637. The reversal of 421012620 is 26210124.

421012620 is a `hidden beast` number, since 42 + 1 + 0 + 1 + 2 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 421012593 and 421012602.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 479622 + ... + 480498.

It is an arithmetic number, because the mean of its divisors is an integer number (7866880).

Almost surely, 2^421012620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421012620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755220480).

421012620 is an abundant number, since it is smaller than the sum of its proper divisors (1089428340).

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

421012620 is a wasteful number, since it uses less digits than its factorization.

421012620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 421012620 is about 20518.5920569614. The cubic root of 421012620 is about 749.4886113882.

Adding to 421012620 its reverse (26210124), we get a palindrome (447222744).

The spelling of 421012620 in words is "four hundred twenty-one million, twelve thousand, six hundred twenty".