612021420 has 240 divisors, whose sum is σ = 2068089408. Its totient is φ = 150958080.

The previous prime is 612021409. The next prime is 612021457. The reversal of 612021420 is 24120216.

612021420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 612021393 and 612021402.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1955184 + ... + 1955496.

Almost surely, 2^612021420 is an apocalyptic number.

612021420 is a gapful number since it is divisible by the number (60) 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 612021420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034044704).

612021420 is an abundant number, since it is smaller than the sum of its proper divisors (1456067988).

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

612021420 is a wasteful number, since it uses less digits than its factorization.

612021420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422 (or 411 counting only the distinct ones).

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

The square root of 612021420 is about 24739.0666760086. The cubic root of 612021420 is about 849.0283799775.

Adding to 612021420 its reverse (24120216), we get a palindrome (636141636).

The spelling of 612021420 in words is "six hundred twelve million, twenty-one thousand, four hundred twenty".