412140021 has 4 divisors (see below), whose sum is σ = 549520032. Its totient is φ = 274760012.

The previous prime is 412139989. The next prime is 412140037. The reversal of 412140021 is 120041214.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 412140021 - 2⁵ = 412139989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (412141021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68690001 + ... + 68690006.

It is an arithmetic number, because the mean of its divisors is an integer number (137380008).

Almost surely, 2^412140021 is an apocalyptic number.

It is an amenable number.

412140021 is a deficient number, since it is larger than the sum of its proper divisors (137380011).

412140021 is a wasteful number, since it uses less digits than its factorization.

412140021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137380010.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 412140021 is about 20301.2320069497. The cubic root of 412140021 is about 744.1861725536.

Adding to 412140021 its reverse (120041214), we get a palindrome (532181235).

The spelling of 412140021 in words is "four hundred twelve million, one hundred forty thousand, twenty-one".