1379021 has 4 divisors (see below), whose sum is σ = 1576032. Its totient is φ = 1182012.

The previous prime is 1379017. The next prime is 1379029. The reversal of 1379021 is 1209731.

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 1379021 - 2² = 1379017 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 (1379029) 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, 98495 + ... + 98508.

It is an arithmetic number, because the mean of its divisors is an integer number (394008).

2^1379021 is an apocalyptic number.

It is an amenable number.

1379021 is a deficient number, since it is larger than the sum of its proper divisors (197011).

1379021 is an equidigital number, since it uses as much as digits as its factorization.

1379021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197010.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1379021 is about 1174.3172484469. The cubic root of 1379021 is about 111.3072944790.

The spelling of 1379021 in words is "one million, three hundred seventy-nine thousand, twenty-one".