1339720 has 16 divisors (see below), whose sum is σ = 3014460. Its totient is φ = 535872.

The previous prime is 1339711. The next prime is 1339729. The reversal of 1339720 is 279331.

It is an interprime number because it is at equal distance from previous prime (1339711) and next prime (1339729).

It can be written as a sum of positive squares in 2 ways, for example, as 1214404 + 125316 = 1102^2 + 354^2 .

It is not an unprimeable number, because it can be changed into a prime (1339729) 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, 16707 + ... + 16786.

2^1339720 is an apocalyptic number.

1339720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1339720 is an abundant number, since it is smaller than the sum of its proper divisors (1674740).

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

1339720 is a wasteful number, since it uses less digits than its factorization.

1339720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33504 (or 33500 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 1339720 is about 1157.4627423809. The cubic root of 1339720 is about 110.2396976883.

The spelling of 1339720 in words is "one million, three hundred thirty-nine thousand, seven hundred twenty".