412220521 has 4 divisors (see below), whose sum is σ = 412549200. Its totient is φ = 411891844.

The previous prime is 412220509. The next prime is 412220581. The reversal of 412220521 is 125022214.

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, and also an emirpimes, since its reverse is a distinct semiprime: 125022214 = 2 ⋅62511107.

It is a cyclic number.

It is not a de Polignac number, because 412220521 - 2⁹ = 412220009 is a prime.

It is a super-2 number, since 2×412220521² = 339851515867022882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (412220581) 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, 162451 + ... + 164968.

It is an arithmetic number, because the mean of its divisors is an integer number (103137300).

Almost surely, 2^412220521 is an apocalyptic number.

It is an amenable number.

412220521 is a deficient number, since it is larger than the sum of its proper divisors (328679).

412220521 is a wasteful number, since it uses less digits than its factorization.

412220521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328678.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 412220521 is about 20303.2145484404. The cubic root of 412220521 is about 744.2346213687.

Adding to 412220521 its reverse (125022214), we get a palindrome (537242735).

The spelling of 412220521 in words is "four hundred twelve million, two hundred twenty thousand, five hundred twenty-one".