1128251 has 2 divisors, whose sum is σ = 1128252. Its totient is φ = 1128250.

The previous prime is 1128247. The next prime is 1128287. The reversal of 1128251 is 1528211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1128251 - 2² = 1128247 is a prime.

It is not a weakly prime, because it can be changed into another prime (1128151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564125 + 564126.

It is an arithmetic number, because the mean of its divisors is an integer number (564126).

2^1128251 is an apocalyptic number.

1128251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128251 is an equidigital number, since it uses as much as digits as its factorization.

1128251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160, while the sum is 20.

The square root of 1128251 is about 1062.1916023016. The cubic root of 1128251 is about 104.1042778052.

It can be divided in two parts, 1128 and 251, that multiplied together give a triangular number (283128 = T₇₅₂).

The spelling of 1128251 in words is "one million, one hundred twenty-eight thousand, two hundred fifty-one".