1247887 has 4 divisors (see below), whose sum is σ = 1252440. Its totient is φ = 1243336.

The previous prime is 1247881. The next prime is 1247893. The reversal of 1247887 is 7887421.

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

It is an interprime number because it is at equal distance from previous prime (1247881) and next prime (1247893).

It is a cyclic number.

It is not a de Polignac number, because 1247887 - 2³ = 1247879 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247881) 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, 1837 + ... + 2422.

It is an arithmetic number, because the mean of its divisors is an integer number (313110).

2^1247887 is an apocalyptic number.

1247887 is a deficient number, since it is larger than the sum of its proper divisors (4553).

1247887 is an equidigital number, since it uses as much as digits as its factorization.

1247887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4552.

The product of its digits is 25088, while the sum is 37.

The square root of 1247887 is about 1117.0886267436. The cubic root of 1247887 is about 107.6610026617.

The spelling of 1247887 in words is "one million, two hundred forty-seven thousand, eight hundred eighty-seven".