1379971 has 4 divisors (see below), whose sum is σ = 1383592. Its totient is φ = 1376352.

The previous prime is 1379969. The next prime is 1379981. The reversal of 1379971 is 1799731.

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 1379971 - 2¹ = 1379969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1379971.

It is not an unprimeable number, because it can be changed into a prime (1379981) 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, 1161 + ... + 2026.

It is an arithmetic number, because the mean of its divisors is an integer number (345898).

2^1379971 is an apocalyptic number.

1379971 is a deficient number, since it is larger than the sum of its proper divisors (3621).

1379971 is an equidigital number, since it uses as much as digits as its factorization.

1379971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620.

The product of its digits is 11907, while the sum is 37.

The square root of 1379971 is about 1174.7216691625. The cubic root of 1379971 is about 111.3328482734.

The spelling of 1379971 in words is "one million, three hundred seventy-nine thousand, nine hundred seventy-one".