1375405 has 8 divisors (see below), whose sum is σ = 1663200. Its totient is φ = 1091856.

The previous prime is 1375379. The next prime is 1375411. The reversal of 1375405 is 5045731.

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

It is a cyclic number.

It is not a de Polignac number, because 1375405 - 2⁵ = 1375373 is a prime.

1375405 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1375405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295 + ... + 1684.

It is an arithmetic number, because the mean of its divisors is an integer number (207900).

2^1375405 is an apocalyptic number.

It is an amenable number.

1375405 is a deficient number, since it is larger than the sum of its proper divisors (287795).

1375405 is a wasteful number, since it uses less digits than its factorization.

1375405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 1375405 is about 1172.7766198215. The cubic root of 1375405 is about 111.2099211772.

The spelling of 1375405 in words is "one million, three hundred seventy-five thousand, four hundred five".