1057213 has 4 divisors (see below), whose sum is σ = 1119420. Its totient is φ = 995008.

The previous prime is 1057183. The next prime is 1057219. The reversal of 1057213 is 3127501.

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 459684 + 597529 = 678^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 1057213 - 2⁵ = 1057181 is a prime.

It is a super-2 number, since 2×1057213² = 2235398654738, which contains 22 as substring.

It is a Duffinian number.

1057213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057219) 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, 31078 + ... + 31111.

It is an arithmetic number, because the mean of its divisors is an integer number (279855).

2^1057213 is an apocalyptic number.

It is an amenable number.

1057213 is a deficient number, since it is larger than the sum of its proper divisors (62207).

1057213 is an equidigital number, since it uses as much as digits as its factorization.

1057213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62206.

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 1057213 is about 1028.2086364158. The cubic root of 1057213 is about 101.8718434040.

It can be divided in two parts, 10572 and 13, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 1057213 in words is "one million, fifty-seven thousand, two hundred thirteen".