1266158 has 4 divisors (see below), whose sum is σ = 1899240. Its totient is φ = 633078.

The previous prime is 1266157. The next prime is 1266163. The reversal of 1266158 is 8516621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1266158.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316538 + ... + 316541.

It is an arithmetic number, because the mean of its divisors is an integer number (474810).

2^1266158 is an apocalyptic number.

1266158 is a deficient number, since it is larger than the sum of its proper divisors (633082).

1266158 is an equidigital number, since it uses as much as digits as its factorization.

1266158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633081.

The product of its digits is 2880, while the sum is 29.

The square root of 1266158 is about 1125.2368639535. The cubic root of 1266158 is about 108.1839002152.

It can be divided in two parts, 1266 and 158, that multiplied together give a triangular number (200028 = T₆₃₂).

The spelling of 1266158 in words is "one million, two hundred sixty-six thousand, one hundred fifty-eight".