1057239 has 8 divisors (see below), whose sum is σ = 1566320. Its totient is φ = 704808.

The previous prime is 1057237. The next prime is 1057249. The reversal of 1057239 is 9327501.

It is not a de Polignac number, because 1057239 - 2¹ = 1057237 is a prime.

It is a super-2 number, since 2×1057239² = 2235508606242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 39157 = 1057239 / (1 + 0 + 5 + 7 + 2 + 3 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057237) 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, 19552 + ... + 19605.

It is an arithmetic number, because the mean of its divisors is an integer number (195790).

2^1057239 is an apocalyptic number.

1057239 is a deficient number, since it is larger than the sum of its proper divisors (509081).

1057239 is an equidigital number, since it uses as much as digits as its factorization.

1057239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39166 (or 39160 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 1057239 is about 1028.2212796864. The cubic root of 1057239 is about 101.8726785073.

It can be divided in two parts, 1057 and 239, that added together give a 4-th power (1296 = 6⁴).

The spelling of 1057239 in words is "one million, fifty-seven thousand, two hundred thirty-nine".