1251158 has 8 divisors (see below), whose sum is σ = 1904952. Its totient is φ = 616176.

The previous prime is 1251157. The next prime is 1251161. The reversal of 1251158 is 8511521.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251157) 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, 4535 + ... + 4802.

It is an arithmetic number, because the mean of its divisors is an integer number (238119).

2^1251158 is an apocalyptic number.

1251158 is a deficient number, since it is larger than the sum of its proper divisors (653794).

1251158 is an equidigital number, since it uses as much as digits as its factorization.

1251158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9406.

The product of its digits is 400, while the sum is 23.

The square root of 1251158 is about 1118.5517422095. The cubic root of 1251158 is about 107.7549887064.

Adding to 1251158 its reverse (8511521), we get a palindrome (9762679).

The spelling of 1251158 in words is "one million, two hundred fifty-one thousand, one hundred fifty-eight".