1387822 has 8 divisors (see below), whose sum is σ = 2102256. Its totient is φ = 687072.

The previous prime is 1387819. The next prime is 1387823. The reversal of 1387822 is 2287831.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3163 + ... + 3574.

It is an arithmetic number, because the mean of its divisors is an integer number (262782).

2^1387822 is an apocalyptic number.

1387822 is a deficient number, since it is larger than the sum of its proper divisors (714434).

1387822 is a wasteful number, since it uses less digits than its factorization.

1387822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6842.

The product of its digits is 5376, while the sum is 31.

The square root of 1387822 is about 1178.0585723978. The cubic root of 1387822 is about 111.5435826058.

Subtracting 1387822 from its reverse (2287831), we obtain a palindrome (900009).

It can be divided in two parts, 1387 and 822, that added together give a square (2209 = 47²).

The spelling of 1387822 in words is "one million, three hundred eighty-seven thousand, eight hundred twenty-two".