1238705 has 32 divisors (see below), whose sum is σ = 1814400. Its totient is φ = 801792.

The previous prime is 1238693. The next prime is 1238717. The reversal of 1238705 is 5078321.

It is an interprime number because it is at equal distance from previous prime (1238693) and next prime (1238717).

It is a cyclic number.

It is not a de Polignac number, because 1238705 - 2⁸ = 1238449 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 20966 + ... + 21024.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2^1238705 is an apocalyptic number.

It is an amenable number.

1238705 is a deficient number, since it is larger than the sum of its proper divisors (575695).

1238705 is a wasteful number, since it uses less digits than its factorization.

1238705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1238705 is about 1112.9712485055. The cubic root of 1238705 is about 107.3962944346.

The spelling of 1238705 in words is "one million, two hundred thirty-eight thousand, seven hundred five".