1285147 has 2 divisors, whose sum is σ = 1285148. Its totient is φ = 1285146.

The previous prime is 1285139. The next prime is 1285159. The reversal of 1285147 is 7415821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285147 - 2³ = 1285139 is a prime.

1285147 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1285117) 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 as a sum of consecutive naturals, namely, 642573 + 642574.

It is an arithmetic number, because the mean of its divisors is an integer number (642574).

2^1285147 is an apocalyptic number.

1285147 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285147 is an equidigital number, since it uses as much as digits as its factorization.

1285147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 28.

The square root of 1285147 is about 1133.6432419417. The cubic root of 1285147 is about 108.7220424015.

The spelling of 1285147 in words is "one million, two hundred eighty-five thousand, one hundred forty-seven".