1258423 has 2 divisors, whose sum is σ = 1258424. Its totient is φ = 1258422.

The previous prime is 1258421. The next prime is 1258429. The reversal of 1258423 is 3248521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1258423 - 2¹ = 1258421 is a prime.

Together with 1258421, it forms a pair of twin primes.

It is an Ulam number.

It is a d-powerful number, because it can be written as 1 + 2⁷ + 5⁷ + 8³ + 4¹⁰ + 2¹⁷ + 3² .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1258421) 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, 629211 + 629212.

It is an arithmetic number, because the mean of its divisors is an integer number (629212).

2^1258423 is an apocalyptic number.

1258423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1258423 is an equidigital number, since it uses as much as digits as its factorization.

1258423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 1258423 is about 1121.7945444688. The cubic root of 1258423 is about 107.9631504371.

It can be divided in two parts, 1258 and 423, that added together give a square (1681 = 41²).

The spelling of 1258423 in words is "one million, two hundred fifty-eight thousand, four hundred twenty-three".