1247489 has 4 divisors (see below), whose sum is σ = 1263360. Its totient is φ = 1231620.

The previous prime is 1247479. The next prime is 1247501. The reversal of 1247489 is 9847421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1247489 - 2¹² = 1243393 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1247419) 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, 7817 + ... + 7974.

It is an arithmetic number, because the mean of its divisors is an integer number (315840).

2^1247489 is an apocalyptic number.

It is an amenable number.

1247489 is a deficient number, since it is larger than the sum of its proper divisors (15871).

1247489 is an equidigital number, since it uses as much as digits as its factorization.

1247489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15870.

The product of its digits is 16128, while the sum is 35.

The square root of 1247489 is about 1116.9104708973. The cubic root of 1247489 is about 107.6495556756.

The spelling of 1247489 in words is "one million, two hundred forty-seven thousand, four hundred eighty-nine".