1382639 has 4 divisors (see below), whose sum is σ = 1385424. Its totient is φ = 1379856.

The previous prime is 1382629. The next prime is 1382651. The reversal of 1382639 is 9362831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9362831 = 2699 ⋅3469.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1382639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1382609) 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, 422 + ... + 1715.

It is an arithmetic number, because the mean of its divisors is an integer number (346356).

2^1382639 is an apocalyptic number.

1382639 is a deficient number, since it is larger than the sum of its proper divisors (2785).

1382639 is an equidigital number, since it uses as much as digits as its factorization.

1382639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784.

The product of its digits is 7776, while the sum is 32.

The square root of 1382639 is about 1175.8567089573. The cubic root of 1382639 is about 111.4045514269.

The spelling of 1382639 in words is "one million, three hundred eighty-two thousand, six hundred thirty-nine".