1287958 has 8 divisors (see below), whose sum is σ = 2207952. Its totient is φ = 551976.

The previous prime is 1287947. The next prime is 1287961. The reversal of 1287958 is 8597821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1287958.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 45985 + ... + 46012.

It is an arithmetic number, because the mean of its divisors is an integer number (275994).

2^1287958 is an apocalyptic number.

1287958 is a deficient number, since it is larger than the sum of its proper divisors (919994).

1287958 is an equidigital number, since it uses as much as digits as its factorization.

1287958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92006.

The product of its digits is 40320, while the sum is 40.

The square root of 1287958 is about 1134.8823727594. The cubic root of 1287958 is about 108.8012538603.

The spelling of 1287958 in words is "one million, two hundred eighty-seven thousand, nine hundred fifty-eight".