1282139 has 4 divisors (see below), whose sum is σ = 1349640. Its totient is φ = 1214640.

The previous prime is 1282133. The next prime is 1282153. The reversal of 1282139 is 9312821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1282139 - 2⁸ = 1281883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1282133) 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, 33722 + ... + 33759.

It is an arithmetic number, because the mean of its divisors is an integer number (337410).

2^1282139 is an apocalyptic number.

1282139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1282139 is a deficient number, since it is larger than the sum of its proper divisors (67501).

1282139 is an equidigital number, since it uses as much as digits as its factorization.

1282139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67500.

The product of its digits is 864, while the sum is 26.

The square root of 1282139 is about 1132.3157686794. The cubic root of 1282139 is about 108.6371516230.

The spelling of 1282139 in words is "one million, two hundred eighty-two thousand, one hundred thirty-nine".