1247860 has 24 divisors (see below), whose sum is σ = 2683296. Its totient is φ = 487200.

The previous prime is 1247837. The next prime is 1247861. The reversal of 1247860 is 687421.

1247860 = T₇₀₄ + T₇₀₅ + ... + T₇₀₈.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247861) 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, 135 + ... + 1585.

It is an arithmetic number, because the mean of its divisors is an integer number (111804).

2^1247860 is an apocalyptic number.

1247860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1247860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341648).

1247860 is an abundant number, since it is smaller than the sum of its proper divisors (1435436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1247860 is a wasteful number, since it uses less digits than its factorization.

1247860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503 (or 1501 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1247860 is about 1117.0765416926. The cubic root of 1247860 is about 107.6602261843.

The spelling of 1247860 in words is "one million, two hundred forty-seven thousand, eight hundred sixty".