1247487 has 8 divisors (see below), whose sum is σ = 1668480. Its totient is φ = 829080.

The previous prime is 1247479. The next prime is 1247501. The reversal of 1247487 is 7847421.

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

It is not a de Polignac number, because 1247487 - 2³ = 1247479 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1564 + ... + 2222.

It is an arithmetic number, because the mean of its divisors is an integer number (208560).

2^1247487 is an apocalyptic number.

1247487 is a deficient number, since it is larger than the sum of its proper divisors (420993).

1247487 is an equidigital number, since it uses as much as digits as its factorization.

1247487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293.

The product of its digits is 12544, while the sum is 33.

The square root of 1247487 is about 1116.9095755700. The cubic root of 1247487 is about 107.6494981469.

It can be divided in two parts, 12474 and 87, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 1247487 in words is "one million, two hundred forty-seven thousand, four hundred eighty-seven".