434921 has 2 divisors, whose sum is σ = 434922. Its totient is φ = 434920.

The previous prime is 434909. The next prime is 434923. The reversal of 434921 is 129434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290521 + 144400 = 539^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 434921 - 2⁶ = 434857 is a prime.

Together with 434923, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (434923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217460 + 217461.

It is an arithmetic number, because the mean of its divisors is an integer number (217461).

2⁴³⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

434921 is a deficient number, since it is larger than the sum of its proper divisors (1).

434921 is an equidigital number, since it uses as much as digits as its factorization.

434921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 23.

The square root of 434921 is about 659.4854054488. The cubic root of 434921 is about 75.7652614053.

The spelling of 434921 in words is "four hundred thirty-four thousand, nine hundred twenty-one".