1942405 has 4 divisors (see below), whose sum is σ = 2330892. Its totient is φ = 1553920.

The previous prime is 1942399. The next prime is 1942411. The reversal of 1942405 is 5042491.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1942399) and next prime (1942411).

It can be written as a sum of positive squares in 2 ways, for example, as 1292769 + 649636 = 1137^2 + 806^2 .

It is not a de Polignac number, because 1942405 - 2¹⁵ = 1909637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1942405.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 194236 + ... + 194245.

It is an arithmetic number, because the mean of its divisors is an integer number (582723).

2^1942405 is an apocalyptic number.

It is an amenable number.

1942405 is a deficient number, since it is larger than the sum of its proper divisors (388487).

1942405 is an equidigital number, since it uses as much as digits as its factorization.

1942405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388486.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1942405 is about 1393.7019049998. The cubic root of 1942405 is about 124.7708869810.

Adding to 1942405 its reverse (5042491), we get a palindrome (6984896).

It can be divided in two parts, 19 and 42405, that added together give a palindrome (42424).

The spelling of 1942405 in words is "one million, nine hundred forty-two thousand, four hundred five".