1248839 has 4 divisors (see below), whose sum is σ = 1272456. Its totient is φ = 1225224.

The previous prime is 1248833. The next prime is 1248847. The reversal of 1248839 is 9388421.

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: 9388421 = 7 ⋅1341203.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1248839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1248799 and 1248808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11729 + ... + 11834.

It is an arithmetic number, because the mean of its divisors is an integer number (318114).

2^1248839 is an apocalyptic number.

1248839 is a deficient number, since it is larger than the sum of its proper divisors (23617).

1248839 is an equidigital number, since it uses as much as digits as its factorization.

1248839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23616.

The product of its digits is 13824, while the sum is 35.

The square root of 1248839 is about 1117.5146531478. The cubic root of 1248839 is about 107.6883735219.

The spelling of 1248839 in words is "one million, two hundred forty-eight thousand, eight hundred thirty-nine".