1405726 has 32 divisors (see below), whose sum is σ = 2580480. Its totient is φ = 561600.

The previous prime is 1405721. The next prime is 1405751. The reversal of 1405726 is 6275041.

It is a super-3 number, since 3×1405726³ = 8333420320373991528, which contains 333 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405726.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17755 + ... + 17833.

It is an arithmetic number, because the mean of its divisors is an integer number (80640).

2^1405726 is an apocalyptic number.

1405726 is a deficient number, since it is larger than the sum of its proper divisors (1174754).

1405726 is a wasteful number, since it uses less digits than its factorization.

1405726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1405726 is about 1185.6331641785. The cubic root of 1405726 is about 112.0212013435.

The spelling of 1405726 in words is "one million, four hundred five thousand, seven hundred twenty-six".