412000021 has 4 divisors (see below), whose sum is σ = 422048844. Its totient is φ = 401951200.

The previous prime is 411999961. The next prime is 412000033. The reversal of 412000021 is 120000214.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41860900 + 370139121 = 6470^2 + 19239^2 .

It is a cyclic number.

It is not a de Polignac number, because 412000021 - 2²¹ = 409902869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 411999971 and 412000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (412000051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5024350 + ... + 5024431.

It is an arithmetic number, because the mean of its divisors is an integer number (105512211).

Almost surely, 2^412000021 is an apocalyptic number.

412000021 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

412000021 is a deficient number, since it is larger than the sum of its proper divisors (10048823).

412000021 is a wasteful number, since it uses less digits than its factorization.

412000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10048822.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 412000021 is about 20297.7836474823. The cubic root of 412000021 is about 744.1018987162.

Adding to 412000021 its reverse (120000214), we get a palindrome (532000235).

It can be divided in two parts, 4 and 12000021, that multiplied together give a palindrome (48000084).

The spelling of 412000021 in words is "four hundred twelve million, twenty-one", and thus it is an aban number.