1285247 has 2 divisors, whose sum is σ = 1285248. Its totient is φ = 1285246.

The previous prime is 1285237. The next prime is 1285259. The reversal of 1285247 is 7425821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1285247 - 2⁴ = 1285231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1285237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642623 + 642624.

It is an arithmetic number, because the mean of its divisors is an integer number (642624).

2^1285247 is an apocalyptic number.

1285247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285247 is an equidigital number, since it uses as much as digits as its factorization.

1285247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 29.

The square root of 1285247 is about 1133.6873466701. The cubic root of 1285247 is about 108.7248622922.

The spelling of 1285247 in words is "one million, two hundred eighty-five thousand, two hundred forty-seven".