454146821 has 2 divisors, whose sum is σ = 454146822. Its totient is φ = 454146820.

The previous prime is 454146811. The next prime is 454146827. The reversal of 454146821 is 128641454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428034721 + 26112100 = 20689^2 + 5110^2 .

It is a cyclic number.

It is not a de Polignac number, because 454146821 - 2¹⁴ = 454130437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (454146827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227073410 + 227073411.

It is an arithmetic number, because the mean of its divisors is an integer number (227073411).

Almost surely, 2^454146821 is an apocalyptic number.

It is an amenable number.

454146821 is a deficient number, since it is larger than the sum of its proper divisors (1).

454146821 is an equidigital number, since it uses as much as digits as its factorization.

454146821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30720, while the sum is 35.

The square root of 454146821 is about 21310.7207996351. The cubic root of 454146821 is about 768.6561261450.

The spelling of 454146821 in words is "four hundred fifty-four million, one hundred forty-six thousand, eight hundred twenty-one".