412507721 has 2 divisors, whose sum is σ = 412507722. Its totient is φ = 412507720.

The previous prime is 412507717. The next prime is 412507747. The reversal of 412507721 is 127705214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 388878400 + 23629321 = 19720^2 + 4861^2 .

It is a cyclic number.

It is not a de Polignac number, because 412507721 - 2² = 412507717 is a prime.

It is a super-2 number, since 2×412507721² = 340325239769227682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (412507751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206253860 + 206253861.

It is an arithmetic number, because the mean of its divisors is an integer number (206253861).

Almost surely, 2^412507721 is an apocalyptic number.

It is an amenable number.

412507721 is a deficient number, since it is larger than the sum of its proper divisors (1).

412507721 is an equidigital number, since it uses as much as digits as its factorization.

412507721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 412507721 is about 20310.2860885808. The cubic root of 412507721 is about 744.4074209197.

The spelling of 412507721 in words is "four hundred twelve million, five hundred seven thousand, seven hundred twenty-one".