1405746 has 24 divisors (see below), whose sum is σ = 3151980. Its totient is φ = 452256.

The previous prime is 1405721. The next prime is 1405751. The reversal of 1405746 is 6475041.

It can be written as a sum of positive squares in 2 ways, for example, as 1404225 + 1521 = 1185^2 + 39^2 .

It is a super-3 number, since 3×1405746³ = 8333776017240302808, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an Ulam number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 825 + ... + 1868.

2^1405746 is an apocalyptic number.

1405746 is an abundant number, since it is smaller than the sum of its proper divisors (1746234).

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

1405746 is a wasteful number, since it uses less digits than its factorization.

1405746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730 (or 2727 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1405746 is about 1185.6415984605. The cubic root of 1405746 is about 112.0217326024.

It can be divided in two parts, 140 and 5746, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 1405746 in words is "one million, four hundred five thousand, seven hundred forty-six".