1247140 has 24 divisors (see below), whose sum is σ = 2644992. Its totient is φ = 493920.

The previous prime is 1247119. The next prime is 1247167. The reversal of 1247140 is 417421.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2295 + ... + 2785.

It is an arithmetic number, because the mean of its divisors is an integer number (110208).

2^1247140 is an apocalyptic number.

1247140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1247140 is an abundant number, since it is smaller than the sum of its proper divisors (1397852).

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

1247140 is a wasteful number, since it uses less digits than its factorization.

1247140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 625 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 1247140 is about 1116.7542254229. The cubic root of 1247140 is about 107.6395159882.

The spelling of 1247140 in words is "one million, two hundred forty-seven thousand, one hundred forty".