1238005 has 4 divisors (see below), whose sum is σ = 1485612. Its totient is φ = 990400.

The previous prime is 1237993. The next prime is 1238023. The reversal of 1238005 is 5008321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5008321 = 1753 ⋅2857.

It can be written as a sum of positive squares in 2 ways, for example, as 651249 + 586756 = 807^2 + 766^2 .

It is not a de Polignac number, because 1238005 - 2⁷ = 1237877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 123796 + ... + 123805.

It is an arithmetic number, because the mean of its divisors is an integer number (371403).

2^1238005 is an apocalyptic number.

It is an amenable number.

1238005 is a deficient number, since it is larger than the sum of its proper divisors (247607).

1238005 is an equidigital number, since it uses as much as digits as its factorization.

1238005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247606.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1238005 is about 1112.6567305328. The cubic root of 1238005 is about 107.3760605151.

It can be divided in two parts, 123 and 8005, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 1238005 in words is "one million, two hundred thirty-eight thousand, five".