424861 has 2 divisors, whose sum is σ = 424862.
Its totient is φ = 424860.
The previous prime is 424849. The next prime is 424867. The reversal of 424861 is 168424.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 416025 + 8836 = 645^2 + 94^2
It is a cyclic number.
It is not a de Polignac number, because 424861 - 25 = 424829 is a prime.
424861 is a lucky number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (424867) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212430 + 212431.
It is an arithmetic number, because the mean of its divisors is an integer number (212431).
2424861 is an apocalyptic number.
424861 is the 292-nd centered decagonal number.
It is an amenable number.
424861 is a deficient number, since it is larger than the sum of its proper divisors (1).
424861 is an equidigital number, since it uses as much as digits as its factorization.
424861 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1536, while the sum is 25.
The square root of 424861 is about 651.8136236686.
The cubic root of 424861 is about 75.1765323067.
The spelling of 424861 in words is "four hundred twenty-four thousand, eight hundred sixty-one".