1307730 has 16 divisors (see below), whose sum is σ = 3138624. Its totient is φ = 348720.

The previous prime is 1307729. The next prime is 1307731. The reversal of 1307730 is 377031.

It is an interprime number because it is at equal distance from previous prime (1307729) and next prime (1307731).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1307697 and 1307706.

It is not an unprimeable number, because it can be changed into a prime (1307731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21766 + ... + 21825.

It is an arithmetic number, because the mean of its divisors is an integer number (196164).

2^1307730 is an apocalyptic number.

1307730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1307730 is an abundant number, since it is smaller than the sum of its proper divisors (1830894).

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

1307730 is a wasteful number, since it uses less digits than its factorization.

1307730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43601.

The product of its (nonzero) digits is 441, while the sum is 21.

The square root of 1307730 is about 1143.5602301584. The cubic root of 1307730 is about 109.3551806265.

The spelling of 1307730 in words is "one million, three hundred seven thousand, seven hundred thirty".