1379811 has 4 divisors (see below), whose sum is σ = 1839752. Its totient is φ = 919872.

The previous prime is 1379809. The next prime is 1379813. The reversal of 1379811 is 1189731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1189731 = 3 ⋅396577.

It is an interprime number because it is at equal distance from previous prime (1379809) and next prime (1379813).

It is not a de Polignac number, because 1379811 - 2¹ = 1379809 is a prime.

It is a D-number.

It is a Duffinian number.

1379811 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1379813) 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, 229966 + ... + 229971.

It is an arithmetic number, because the mean of its divisors is an integer number (459938).

2^1379811 is an apocalyptic number.

1379811 is a deficient number, since it is larger than the sum of its proper divisors (459941).

1379811 is an equidigital number, since it uses as much as digits as its factorization.

1379811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459940.

The product of its digits is 1512, while the sum is 30.

The square root of 1379811 is about 1174.6535659504. The cubic root of 1379811 is about 111.3285452979.

The spelling of 1379811 in words is "one million, three hundred seventy-nine thousand, eight hundred eleven".