1379539 has 4 divisors (see below), whose sum is σ = 1576624. Its totient is φ = 1182456.

The previous prime is 1379519. The next prime is 1379549. The reversal of 1379539 is 9359731.

1379539 = 477² + 478² + ... + 482².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9359731 = 179 ⋅52289.

It is a cyclic number.

It is not a de Polignac number, because 1379539 - 2¹¹ = 1377491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1379498 and 1379507.

It is not an unprimeable number, because it can be changed into a prime (1379509) 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, 98532 + ... + 98545.

It is an arithmetic number, because the mean of its divisors is an integer number (394156).

2^1379539 is an apocalyptic number.

1379539 is a deficient number, since it is larger than the sum of its proper divisors (197085).

1379539 is an equidigital number, since it uses as much as digits as its factorization.

1379539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197084.

The product of its digits is 25515, while the sum is 37.

The square root of 1379539 is about 1174.5377814272. The cubic root of 1379539 is about 111.3212294761.

The spelling of 1379539 in words is "one million, three hundred seventy-nine thousand, five hundred thirty-nine".