1380791 has 4 divisors (see below), whose sum is σ = 1462032. Its totient is φ = 1299552.

The previous prime is 1380781. The next prime is 1380793. The reversal of 1380791 is 1970831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1970831 = 1231 ⋅1601.

It is a cyclic number.

It is not a de Polignac number, because 1380791 - 2⁶ = 1380727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380793) 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, 40595 + ... + 40628.

It is an arithmetic number, because the mean of its divisors is an integer number (365508).

2^1380791 is an apocalyptic number.

1380791 is a deficient number, since it is larger than the sum of its proper divisors (81241).

1380791 is an equidigital number, since it uses as much as digits as its factorization.

1380791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81240.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1380791 is about 1175.0706361747. The cubic root of 1380791 is about 111.3548958041.

The spelling of 1380791 in words is "one million, three hundred eighty thousand, seven hundred ninety-one".