1272158 has 8 divisors (see below), whose sum is σ = 1940760. Its totient is φ = 625240.

The previous prime is 1272157. The next prime is 1272163. The reversal of 1272158 is 8512721.

1272158 is nontrivially palindromic in base 5.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272151) 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, 5273 + ... + 5508.

It is an arithmetic number, because the mean of its divisors is an integer number (242595).

2^1272158 is an apocalyptic number.

1272158 is a deficient number, since it is larger than the sum of its proper divisors (668602).

1272158 is a wasteful number, since it uses less digits than its factorization.

1272158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10842.

The product of its digits is 1120, while the sum is 26.

The square root of 1272158 is about 1127.8998182463. The cubic root of 1272158 is about 108.3545163048.

Adding to 1272158 its reverse (8512721), we get a palindrome (9784879).

The spelling of 1272158 in words is "one million, two hundred seventy-two thousand, one hundred fifty-eight".