1405727 has 4 divisors (see below), whose sum is σ = 1426776. Its totient is φ = 1384680.

The previous prime is 1405721. The next prime is 1405751. The reversal of 1405727 is 7275041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405727 is a prime.

It is a super-3 number, since 3×1405727³ = 8333438104976926749, which contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1405696 and 1405705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1405721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10424 + ... + 10557.

It is an arithmetic number, because the mean of its divisors is an integer number (356694).

2^1405727 is an apocalyptic number.

1405727 is a deficient number, since it is larger than the sum of its proper divisors (21049).

1405727 is an equidigital number, since it uses as much as digits as its factorization.

1405727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21048.

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 1405727 is about 1185.6335858941. The cubic root of 1405727 is about 112.0212279066.

The spelling of 1405727 in words is "one million, four hundred five thousand, seven hundred twenty-seven".