1245729 has 8 divisors (see below), whose sum is σ = 1668832. Its totient is φ = 826560.

The previous prime is 1245721. The next prime is 1245763. The reversal of 1245729 is 9275421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1245729 - 2³ = 1245721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1245696 and 1245705.

It is not an unprimeable number, because it can be changed into a prime (1245721) 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, 139 + ... + 1584.

It is an arithmetic number, because the mean of its divisors is an integer number (208604).

2^1245729 is an apocalyptic number.

It is an amenable number.

1245729 is a deficient number, since it is larger than the sum of its proper divisors (423103).

1245729 is a wasteful number, since it uses less digits than its factorization.

1245729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967.

The product of its digits is 5040, while the sum is 30.

The square root of 1245729 is about 1116.1223051261. The cubic root of 1245729 is about 107.5989066283.

The spelling of 1245729 in words is "one million, two hundred forty-five thousand, seven hundred twenty-nine".