412861721 has 2 divisors, whose sum is σ = 412861722. Its totient is φ = 412861720.

The previous prime is 412861717. The next prime is 412861727. The reversal of 412861721 is 127168214.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293265625 + 119596096 = 17125^2 + 10936^2 .

It is a cyclic number.

It is not a de Polignac number, because 412861721 - 2² = 412861717 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (412861727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206430860 + 206430861.

It is an arithmetic number, because the mean of its divisors is an integer number (206430861).

Almost surely, 2^412861721 is an apocalyptic number.

It is an amenable number.

412861721 is a deficient number, since it is larger than the sum of its proper divisors (1).

412861721 is an equidigital number, since it uses as much as digits as its factorization.

412861721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 412861721 is about 20318.9990156996. Note that the first 3 decimals coincide. The cubic root of 412861721 is about 744.6203016879.

The spelling of 412861721 in words is "four hundred twelve million, eight hundred sixty-one thousand, seven hundred twenty-one".