1239980 has 48 divisors (see below), whose sum is σ = 3157056. Its totient is φ = 399360.

The previous prime is 1239971. The next prime is 1239983. The reversal of 1239980 is 899321.

1239980 is nontrivially palindromic in base 8.

1239980 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1239983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2120 + ... + 2640.

It is an arithmetic number, because the mean of its divisors is an integer number (65772).

2^1239980 is an apocalyptic number.

1239980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1239980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578528).

1239980 is an abundant number, since it is smaller than the sum of its proper divisors (1917076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1239980 is a wasteful number, since it uses less digits than its factorization.

1239980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1239980 is about 1113.5438922647. The cubic root of 1239980 is about 107.4331294952.

The spelling of 1239980 in words is "one million, two hundred thirty-nine thousand, nine hundred eighty".