1873405 has 4 divisors (see below), whose sum is σ = 2248092. Its totient is φ = 1498720.

The previous prime is 1873379. The next prime is 1873409. The reversal of 1873405 is 5043781.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5043781 = 17 ⋅296693.

It can be written as a sum of positive squares in 2 ways, for example, as 459684 + 1413721 = 678^2 + 1189^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1873405 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1873409) 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, 187336 + ... + 187345.

It is an arithmetic number, because the mean of its divisors is an integer number (562023).

2^1873405 is an apocalyptic number.

It is an amenable number.

1873405 is a deficient number, since it is larger than the sum of its proper divisors (374687).

1873405 is an equidigital number, since it uses as much as digits as its factorization.

1873405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374686.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 1873405 is about 1368.7238581978. The cubic root of 1873405 is about 123.2756283905.

It can be divided in two parts, 1873 and 405, that added together give a triangular number (2278 = T₆₇).

The spelling of 1873405 in words is "one million, eight hundred seventy-three thousand, four hundred five".