621012000 has 192 divisors, whose sum is σ = 2325383424. Its totient is φ = 141926400.

The previous prime is 621011957. The next prime is 621012001. The reversal of 621012000 is 210126.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (621012001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80304 + ... + 87696.

It is an arithmetic number, because the mean of its divisors is an integer number (12111372).

Almost surely, 2^621012000 is an apocalyptic number.

621012000 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 621012000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1162691712).

621012000 is an abundant number, since it is smaller than the sum of its proper divisors (1704371424).

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

621012000 is a wasteful number, since it uses less digits than its factorization.

621012000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7428 (or 7410 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 621012000 is about 24920.1123592973. The cubic root of 621012000 is about 853.1655893152.

Adding to 621012000 its reverse (210126), we get a palindrome (621222126).

The spelling of 621012000 in words is "six hundred twenty-one million, twelve thousand".