1207840 has 24 divisors (see below), whose sum is σ = 2853900. Its totient is φ = 483072.

The previous prime is 1207769. The next prime is 1207841. The reversal of 1207840 is 487021.

It can be written as a sum of positive squares in 2 ways, for example, as 1192464 + 15376 = 1092^2 + 124^2 .

It is not an unprimeable number, because it can be changed into a prime (1207841) 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, 3615 + ... + 3934.

2^1207840 is an apocalyptic number.

1207840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1207840 is an abundant number, since it is smaller than the sum of its proper divisors (1646060).

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

1207840 is an equidigital number, since it uses as much as digits as its factorization.

1207840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7564 (or 7556 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1207840 is about 1099.0177432599. The cubic root of 1207840 is about 106.4967781726.

The spelling of 1207840 in words is "one million, two hundred seven thousand, eight hundred forty".