1242158 has 8 divisors (see below), whose sum is σ = 1873200. Its totient is φ = 617760.

The previous prime is 1242151. The next prime is 1242167. The reversal of 1242158 is 8512421.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1163 + ... + 1958.

It is an arithmetic number, because the mean of its divisors is an integer number (234150).

2^1242158 is an apocalyptic number.

1242158 is a deficient number, since it is larger than the sum of its proper divisors (631042).

1242158 is a wasteful number, since it uses less digits than its factorization.

1242158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3322.

The product of its digits is 640, while the sum is 23.

The square root of 1242158 is about 1114.5214219565. The cubic root of 1242158 is about 107.4959940818.

Adding to 1242158 its reverse (8512421), we get a palindrome (9754579).

The spelling of 1242158 in words is "one million, two hundred forty-two thousand, one hundred fifty-eight".