1381667 has 4 divisors (see below), whose sum is σ = 1579056. Its totient is φ = 1184280.

The previous prime is 1381649. The next prime is 1381693. The reversal of 1381667 is 7661831.

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 1381667 - 2⁸ = 1381411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381637) 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, 98684 + ... + 98697.

It is an arithmetic number, because the mean of its divisors is an integer number (394764).

2^1381667 is an apocalyptic number.

1381667 is a deficient number, since it is larger than the sum of its proper divisors (197389).

1381667 is an equidigital number, since it uses as much as digits as its factorization.

1381667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197388.

The product of its digits is 6048, while the sum is 32.

The square root of 1381667 is about 1175.4433206242. The cubic root of 1381667 is about 111.3784393786.

It can be divided in two parts, 1381 and 667, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1381667 in words is "one million, three hundred eighty-one thousand, six hundred sixty-seven".