1379405 has 4 divisors (see below), whose sum is σ = 1655292. Its totient is φ = 1103520.

The previous prime is 1379387. The next prime is 1379423. The reversal of 1379405 is 5049731.

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 (1379387) and next prime (1379423).

It can be written as a sum of positive squares in 2 ways, for example, as 1069156 + 310249 = 1034^2 + 557^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1379405 is a prime.

It is a Duffinian 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, 137936 + ... + 137945.

It is an arithmetic number, because the mean of its divisors is an integer number (413823).

2^1379405 is an apocalyptic number.

It is an amenable number.

1379405 is a deficient number, since it is larger than the sum of its proper divisors (275887).

1379405 is an equidigital number, since it uses as much as digits as its factorization.

1379405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275886.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1379405 is about 1174.4807363256. The cubic root of 1379405 is about 111.3176250044.

The spelling of 1379405 in words is "one million, three hundred seventy-nine thousand, four hundred five".