1385557 has 4 divisors (see below), whose sum is σ = 1393740. Its totient is φ = 1377376.

The previous prime is 1385521. The next prime is 1385561. The reversal of 1385557 is 7555831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1100401 + 285156 = 1049^2 + 534^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385557 - 2⁷ = 1385429 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 (1385507) 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, 3832 + ... + 4177.

It is an arithmetic number, because the mean of its divisors is an integer number (348435).

2^1385557 is an apocalyptic number.

It is an amenable number.

1385557 is a deficient number, since it is larger than the sum of its proper divisors (8183).

1385557 is an equidigital number, since it uses as much as digits as its factorization.

1385557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8182.

The product of its digits is 21000, while the sum is 34.

The square root of 1385557 is about 1177.0968524297. The cubic root of 1385557 is about 111.4828678592.

The spelling of 1385557 in words is "one million, three hundred eighty-five thousand, five hundred fifty-seven".