1379861 has 4 divisors (see below), whose sum is σ = 1576992. Its totient is φ = 1182732.

The previous prime is 1379857. The next prime is 1379867. The reversal of 1379861 is 1689731.

1379861 is nontrivially palindromic in base 2 and base 8.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1379861 - 2² = 1379857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1379867) 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, 98555 + ... + 98568.

It is an arithmetic number, because the mean of its divisors is an integer number (394248).

2^1379861 is an apocalyptic number.

It is an amenable number.

1379861 is a deficient number, since it is larger than the sum of its proper divisors (197131).

1379861 is an equidigital number, since it uses as much as digits as its factorization.

1379861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197130.

The product of its digits is 9072, while the sum is 35.

The square root of 1379861 is about 1174.6748486283. The cubic root of 1379861 is about 111.3298900135.

The spelling of 1379861 in words is "one million, three hundred seventy-nine thousand, eight hundred sixty-one".