1378722 has 16 divisors (see below), whose sum is σ = 2803392. Its totient is φ = 451920.

The previous prime is 1378721. The next prime is 1378733. The reversal of 1378722 is 2278731.

It is a self number, because there is not a number n which added to its sum of digits gives 1378722.

It is not an unprimeable number, because it can be changed into a prime (1378721) 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, 1518 + ... + 2249.

It is an arithmetic number, because the mean of its divisors is an integer number (175212).

2^1378722 is an apocalyptic number.

1378722 is an abundant number, since it is smaller than the sum of its proper divisors (1424670).

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

1378722 is a wasteful number, since it uses less digits than its factorization.

1378722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3833.

The product of its digits is 4704, while the sum is 30.

The square root of 1378722 is about 1174.1899335286. The cubic root of 1378722 is about 111.2992493304.

Subtracting 1378722 from its reverse (2278731), we obtain a palindrome (900009).

The spelling of 1378722 in words is "one million, three hundred seventy-eight thousand, seven hundred twenty-two".