1238899 has 4 divisors (see below), whose sum is σ = 1241136. Its totient is φ = 1236664.

The previous prime is 1238893. The next prime is 1238903. The reversal of 1238899 is 9988321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1238899 - 2⁷ = 1238771 is a prime.

It is a Duffinian number.

1238899 is a lucky number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1238893) 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 in 3 ways as a sum of consecutive naturals, for example, 402 + ... + 1624.

It is an arithmetic number, because the mean of its divisors is an integer number (310284).

2^1238899 is an apocalyptic number.

1238899 is a deficient number, since it is larger than the sum of its proper divisors (2237).

1238899 is a wasteful number, since it uses less digits than its factorization.

1238899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236.

The product of its digits is 31104, while the sum is 40.

The square root of 1238899 is about 1113.0583991867. The cubic root of 1238899 is about 107.4019007717.

The spelling of 1238899 in words is "one million, two hundred thirty-eight thousand, eight hundred ninety-nine".