1239872 has 14 divisors (see below), whose sum is σ = 2460498. Its totient is φ = 619904.

The previous prime is 1239839. The next prime is 1239877. The reversal of 1239872 is 2789321.

It can be written as a sum of positive squares in only one way, i.e., 952576 + 287296 = 976^2 + 536^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9623 + ... + 9750.

2^1239872 is an apocalyptic number.

It is an amenable number.

1239872 is a deficient number, since it is larger than the sum of its proper divisors (1220626).

1239872 is an equidigital number, since it uses as much as digits as its factorization.

1239872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19385 (or 19375 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 1239872 is about 1113.4953973861. The cubic root of 1239872 is about 107.4300103280.

The spelling of 1239872 in words is "one million, two hundred thirty-nine thousand, eight hundred seventy-two".