1213158 has 32 divisors (see below), whose sum is σ = 2592000. Its totient is φ = 377696.

The previous prime is 1213153. The next prime is 1213183. The reversal of 1213158 is 8513121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8068 + ... + 8216.

It is an arithmetic number, because the mean of its divisors is an integer number (81000).

2^1213158 is an apocalyptic number.

1213158 is an abundant number, since it is smaller than the sum of its proper divisors (1378842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213158 is a wasteful number, since it uses less digits than its factorization.

1213158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236.

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

The square root of 1213158 is about 1101.4345191613. The cubic root of 1213158 is about 106.6528476021.

Adding to 1213158 its reverse (8513121), we get a palindrome (9726279).

The spelling of 1213158 in words is "one million, two hundred thirteen thousand, one hundred fifty-eight".