1442405 has 4 divisors (see below), whose sum is σ = 1730892. Its totient is φ = 1153920.

The previous prime is 1442393. The next prime is 1442411. The reversal of 1442405 is 5042441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5042441 = 1213 ⋅4157.

It can be written as a sum of positive squares in 2 ways, for example, as 516961 + 925444 = 719^2 + 962^2 .

It is not a de Polignac number, because 1442405 - 2⁶ = 1442341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144236 + ... + 144245.

It is an arithmetic number, because the mean of its divisors is an integer number (432723).

2^1442405 is an apocalyptic number.

It is an amenable number.

1442405 is a deficient number, since it is larger than the sum of its proper divisors (288487).

1442405 is an equidigital number, since it uses as much as digits as its factorization.

1442405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288486.

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

The square root of 1442405 is about 1201.0016652778. The cubic root of 1442405 is about 112.9871549343.

Adding to 1442405 its reverse (5042441), we get a palindrome (6484846).

The spelling of 1442405 in words is "one million, four hundred forty-two thousand, four hundred five".