1243087 has 4 divisors (see below), whose sum is σ = 1272040. Its totient is φ = 1214136.

The previous prime is 1243013. The next prime is 1243093. The reversal of 1243087 is 7803421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7803421 = 269 ⋅29009.

It is a cyclic number.

It is not a de Polignac number, because 1243087 - 2⁷ = 1242959 is a prime.

It is a Duffinian number.

1243087 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243097) 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, 14412 + ... + 14497.

It is an arithmetic number, because the mean of its divisors is an integer number (318010).

2^1243087 is an apocalyptic number.

1243087 is a deficient number, since it is larger than the sum of its proper divisors (28953).

1243087 is an equidigital number, since it uses as much as digits as its factorization.

1243087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28952.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1243087 is about 1114.9381148745. The cubic root of 1243087 is about 107.5227858676.

The spelling of 1243087 in words is "one million, two hundred forty-three thousand, eighty-seven".