1258287 has 4 divisors (see below), whose sum is σ = 1677720. Its totient is φ = 838856.

The previous prime is 1258267. The next prime is 1258291. The reversal of 1258287 is 7828521.

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

It is a cyclic number.

It is not a de Polignac number, because 1258287 - 2¹⁸ = 996143 is a prime.

It is a D-number.

1258287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1258207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209712 + ... + 209717.

It is an arithmetic number, because the mean of its divisors is an integer number (419430).

2^1258287 is an apocalyptic number.

1258287 is a deficient number, since it is larger than the sum of its proper divisors (419433).

1258287 is an equidigital number, since it uses as much as digits as its factorization.

1258287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419432.

The product of its digits is 8960, while the sum is 33.

The square root of 1258287 is about 1121.7339256704. The cubic root of 1258287 is about 107.9592610407.

The spelling of 1258287 in words is "one million, two hundred fifty-eight thousand, two hundred eighty-seven".