1373555 has 4 divisors (see below), whose sum is σ = 1648272. Its totient is φ = 1098840.

The previous prime is 1373543. The next prime is 1373557. The reversal of 1373555 is 5553731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5553731 = 211 ⋅26321.

It is not a de Polignac number, because 1373555 - 2⁴ = 1373539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1373557) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 137351 + ... + 137360.

It is an arithmetic number, because the mean of its divisors is an integer number (412068).

2^1373555 is an apocalyptic number.

1373555 is a deficient number, since it is larger than the sum of its proper divisors (274717).

1373555 is an equidigital number, since it uses as much as digits as its factorization.

1373555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274716.

The product of its digits is 7875, while the sum is 29.

The square root of 1373555 is about 1171.9876279210. The cubic root of 1373555 is about 111.1600375268.

Adding to 1373555 its sum of digits (29), we get a square (1373584 = 1172²).

The spelling of 1373555 in words is "one million, three hundred seventy-three thousand, five hundred fifty-five".