1057539 has 8 divisors (see below), whose sum is σ = 1611520. Its totient is φ = 604296.

The previous prime is 1057531. The next prime is 1057541. The reversal of 1057539 is 9357501.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1057539 - 2³ = 1057531 is a prime.

It is a super-2 number, since 2×1057539² = 2236777473042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25159 + ... + 25200.

It is an arithmetic number, because the mean of its divisors is an integer number (201440).

2^1057539 is an apocalyptic number.

1057539 is a deficient number, since it is larger than the sum of its proper divisors (553981).

1057539 is an equidigital number, since it uses as much as digits as its factorization.

1057539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50369.

The product of its (nonzero) digits is 4725, while the sum is 30.

The square root of 1057539 is about 1028.3671523342. The cubic root of 1057539 is about 101.8823133245.

It can be divided in two parts, 1057 and 539, that added together give a triangular number (1596 = T₅₆).

The spelling of 1057539 in words is "one million, fifty-seven thousand, five hundred thirty-nine".