1128947 has 2 divisors, whose sum is σ = 1128948. Its totient is φ = 1128946.

The previous prime is 1128943. The next prime is 1128949. The reversal of 1128947 is 7498211.

1128947 is nontrivially palindromic in base 5.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1128947 - 2² = 1128943 is a prime.

Together with 1128949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1128943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564473 + 564474.

It is an arithmetic number, because the mean of its divisors is an integer number (564474).

2^1128947 is an apocalyptic number.

1128947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128947 is an equidigital number, since it uses as much as digits as its factorization.

1128947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 1128947 is about 1062.5191762975. The cubic root of 1128947 is about 104.1256801596.

The spelling of 1128947 in words is "one million, one hundred twenty-eight thousand, nine hundred forty-seven".