1405442 has 4 divisors (see below), whose sum is σ = 2108166. Its totient is φ = 702720.

The previous prime is 1405421. The next prime is 1405451. The reversal of 1405442 is 2445041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2445041 = 1093 ⋅2237.

It can be written as a sum of positive squares in only one way, i.e., 1229881 + 175561 = 1109^2 + 419^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351359 + ... + 351362.

2^1405442 is an apocalyptic number.

1405442 is a deficient number, since it is larger than the sum of its proper divisors (702724).

1405442 is an equidigital number, since it uses as much as digits as its factorization.

1405442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702723.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1405442 is about 1185.5133908986. The cubic root of 1405442 is about 112.0136569231.

The spelling of 1405442 in words is "one million, four hundred five thousand, four hundred forty-two".