1138251 has 4 divisors (see below), whose sum is σ = 1517672. Its totient is φ = 758832.

The previous prime is 1138237. The next prime is 1138273. The reversal of 1138251 is 1528311.

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

It is not a de Polignac number, because 1138251 - 2¹¹ = 1136203 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138451) 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, 189706 + ... + 189711.

It is an arithmetic number, because the mean of its divisors is an integer number (379418).

2^1138251 is an apocalyptic number.

1138251 is a deficient number, since it is larger than the sum of its proper divisors (379421).

1138251 is an equidigital number, since it uses as much as digits as its factorization.

1138251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379420.

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

The square root of 1138251 is about 1066.8884665231. Note that the first 3 decimals coincide. The cubic root of 1138251 is about 104.4109418810.

The spelling of 1138251 in words is "one million, one hundred thirty-eight thousand, two hundred fifty-one".