423457 has 2 divisors, whose sum is σ = 423458. Its totient is φ = 423456.

The previous prime is 423439. The next prime is 423461. The reversal of 423457 is 754324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287296 + 136161 = 536^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 423457 - 2¹¹ = 421409 is a prime.

It is an Ulam number.

It is equal to p₃₅₆₅₆ and since 423457 and 35656 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (423427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211728 + 211729.

It is an arithmetic number, because the mean of its divisors is an integer number (211729).

2⁴²³⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

423457 is a deficient number, since it is larger than the sum of its proper divisors (1).

423457 is an equidigital number, since it uses as much as digits as its factorization.

423457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 25.

The square root of 423457 is about 650.7357374542. The cubic root of 423457 is about 75.0936312088.

The spelling of 423457 in words is "four hundred twenty-three thousand, four hundred fifty-seven".