1381922 has 8 divisors (see below), whose sum is σ = 2112156. Its totient is φ = 677872.

The previous prime is 1381921. The next prime is 1381967. The reversal of 1381922 is 2291831.

It can be written as a sum of positive squares in 2 ways, for example, as 1324801 + 57121 = 1151^2 + 239^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1381891 and 1381900.

It is not an unprimeable number, because it can be changed into a prime (1381921) 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, 6413 + ... + 6624.

2^1381922 is an apocalyptic number.

1381922 is a deficient number, since it is larger than the sum of its proper divisors (730234).

1381922 is a wasteful number, since it uses less digits than its factorization.

1381922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13092.

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

The square root of 1381922 is about 1175.5517853332. The cubic root of 1381922 is about 111.3852909463.

Subtracting 1381922 from its reverse (2291831), we obtain a palindrome (909909).

The spelling of 1381922 in words is "one million, three hundred eighty-one thousand, nine hundred twenty-two".