1405994 has 8 divisors (see below), whose sum is σ = 2118468. Its totient is φ = 699840.

The previous prime is 1405979. The next prime is 1405997. The reversal of 1405994 is 4995041.

It can be written as a sum of positive squares in 2 ways, for example, as 1075369 + 330625 = 1037^2 + 575^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1405994.

It is not an unprimeable number, because it can be changed into a prime (1405997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977 + ... + 1940.

2^1405994 is an apocalyptic number.

1405994 is a deficient number, since it is larger than the sum of its proper divisors (712474).

1405994 is a wasteful number, since it uses less digits than its factorization.

1405994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1405994 is about 1185.7461785728. The cubic root of 1405994 is about 112.0283197944.

It can be divided in two parts, 140 and 5994, that multiplied together give a triangular number (839160 = T₁₂₉₅).

The spelling of 1405994 in words is "one million, four hundred five thousand, nine hundred ninety-four".