1339987 has 8 divisors (see below), whose sum is σ = 1486512. Its totient is φ = 1197600.

The previous prime is 1339973. The next prime is 1339993. The reversal of 1339987 is 7899331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1339987 - 2⁷ = 1339859 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1339907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328 + ... + 1669.

It is an arithmetic number, because the mean of its divisors is an integer number (185814).

2^1339987 is an apocalyptic number.

1339987 is a deficient number, since it is larger than the sum of its proper divisors (146525).

1339987 is a wasteful number, since it uses less digits than its factorization.

1339987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069.

The product of its digits is 40824, while the sum is 40.

The square root of 1339987 is about 1157.5780751206. The cubic root of 1339987 is about 110.2470206225.

It can be divided in two parts, 13 and 39987, that added together give a square (40000 = 200²).

The spelling of 1339987 in words is "one million, three hundred thirty-nine thousand, nine hundred eighty-seven".