1381579 has 4 divisors (see below), whose sum is σ = 1395360. Its totient is φ = 1367800.

The previous prime is 1381559. The next prime is 1381609. The reversal of 1381579 is 9751831.

It is a happy number.

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 1381579 - 2⁷ = 1381451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381519) 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, 6739 + ... + 6940.

It is an arithmetic number, because the mean of its divisors is an integer number (348840).

2^1381579 is an apocalyptic number.

1381579 is a deficient number, since it is larger than the sum of its proper divisors (13781).

1381579 is a wasteful number, since it uses less digits than its factorization.

1381579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13780.

The product of its digits is 7560, while the sum is 34.

The square root of 1381579 is about 1175.4058873428. The cubic root of 1381579 is about 111.3760747204.

The spelling of 1381579 in words is "one million, three hundred eighty-one thousand, five hundred seventy-nine".