412240021 has 8 divisors (see below), whose sum is σ = 443888640. Its totient is φ = 381413568.

The previous prime is 412240019. The next prime is 412240061. The reversal of 412240021 is 120042214.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 412240021 - 2¹ = 412240019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 412239977 and 412240004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (412240061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204501 + ... + 206506.

It is an arithmetic number, because the mean of its divisors is an integer number (55486080).

Almost surely, 2^412240021 is an apocalyptic number.

It is an amenable number.

412240021 is a deficient number, since it is larger than the sum of its proper divisors (31648619).

412240021 is a wasteful number, since it uses less digits than its factorization.

412240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411083.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 412240021 is about 20303.6947622840. The cubic root of 412240021 is about 744.2463564680.

Adding to 412240021 its reverse (120042214), we get a palindrome (532282235).

The spelling of 412240021 in words is "four hundred twelve million, two hundred forty thousand, twenty-one".