1239849 has 12 divisors (see below), whose sum is σ = 1928836. Its totient is φ = 762912.

The previous prime is 1239839. The next prime is 1239877. The reversal of 1239849 is 9489321.

It can be written as a sum of positive squares in 2 ways, for example, as 99225 + 1140624 = 315^2 + 1068^2 .

It is not a de Polignac number, because 1239849 - 2⁵ = 1239817 is a prime.

1239849 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1239839) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 5182 + ... + 5415.

2^1239849 is an apocalyptic number.

It is an amenable number.

1239849 is a deficient number, since it is larger than the sum of its proper divisors (688987).

1239849 is a wasteful number, since it uses less digits than its factorization.

1239849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10616 (or 10613 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1239849 is about 1113.4850695003. The cubic root of 1239849 is about 107.4293460375.

The spelling of 1239849 in words is "one million, two hundred thirty-nine thousand, eight hundred forty-nine".