451939 has 2 divisors, whose sum is σ = 451940. Its totient is φ = 451938.

The previous prime is 451937. The next prime is 451961. The reversal of 451939 is 939154.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 451939 - 2¹ = 451937 is a prime.

Together with 451937, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 451939.

It is not a weakly prime, because it can be changed into another prime (451933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225969 + 225970.

It is an arithmetic number, because the mean of its divisors is an integer number (225970).

2⁴⁵¹⁹³⁹ is an apocalyptic number.

451939 is a deficient number, since it is larger than the sum of its proper divisors (1).

451939 is an equidigital number, since it uses as much as digits as its factorization.

451939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 31.

The square root of 451939 is about 672.2640850142. The cubic root of 451939 is about 76.7408502711.

The spelling of 451939 in words is "four hundred fifty-one thousand, nine hundred thirty-nine".