1158213 has 12 divisors (see below), whose sum is σ = 1796640. Its totient is φ = 661752.

The previous prime is 1158203. The next prime is 1158217. The reversal of 1158213 is 3128511.

It is not a de Polignac number, because 1158213 - 2⁴ = 1158197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1158213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3793 + ... + 4086.

It is an arithmetic number, because the mean of its divisors is an integer number (149720).

2^1158213 is an apocalyptic number.

It is an amenable number.

1158213 is a deficient number, since it is larger than the sum of its proper divisors (638427).

1158213 is an equidigital number, since it uses as much as digits as its factorization.

1158213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7896 (or 7889 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 1158213 is about 1076.2030477563. The cubic root of 1158213 is about 105.0177747686.

The spelling of 1158213 in words is "one million, one hundred fifty-eight thousand, two hundred thirteen".