434551021 has 2 divisors, whose sum is σ = 434551022. Its totient is φ = 434551020.

The previous prime is 434551001. The next prime is 434551031. The reversal of 434551021 is 120155434.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221712100 + 212838921 = 14890^2 + 14589^2 .

It is a cyclic number.

It is not a de Polignac number, because 434551021 - 2⁹ = 434550509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434551001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217275510 + 217275511.

It is an arithmetic number, because the mean of its divisors is an integer number (217275511).

Almost surely, 2^434551021 is an apocalyptic number.

It is an amenable number.

434551021 is a deficient number, since it is larger than the sum of its proper divisors (1).

434551021 is an equidigital number, since it uses as much as digits as its factorization.

434551021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 434551021 is about 20845.8873881636. The cubic root of 434551021 is about 757.4377128945.

The spelling of 434551021 in words is "four hundred thirty-four million, five hundred fifty-one thousand, twenty-one".