452164721 has 2 divisors, whose sum is σ = 452164722. Its totient is φ = 452164720.

The previous prime is 452164681. The next prime is 452164733. The reversal of 452164721 is 127461254.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285238321 + 166926400 = 16889^2 + 12920^2 .

It is a cyclic number.

It is not a de Polignac number, because 452164721 - 2¹⁰ = 452163697 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (452164121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 226082360 + 226082361.

It is an arithmetic number, because the mean of its divisors is an integer number (226082361).

Almost surely, 2^452164721 is an apocalyptic number.

It is an amenable number.

452164721 is a deficient number, since it is larger than the sum of its proper divisors (1).

452164721 is an equidigital number, since it uses as much as digits as its factorization.

452164721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 452164721 is about 21264.1651846481. The cubic root of 452164721 is about 767.5362422098.

The spelling of 452164721 in words is "four hundred fifty-two million, one hundred sixty-four thousand, seven hundred twenty-one".