1260505 has 4 divisors (see below), whose sum is σ = 1512612. Its totient is φ = 1008400.

The previous prime is 1260487. The next prime is 1260509. The reversal of 1260505 is 5050621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5050621 = 383 ⋅13187.

It can be written as a sum of positive squares in 2 ways, for example, as 170569 + 1089936 = 413^2 + 1044^2 .

It is not a de Polignac number, because 1260505 - 2⁵ = 1260473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260509) 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, 126046 + ... + 126055.

It is an arithmetic number, because the mean of its divisors is an integer number (378153).

2^1260505 is an apocalyptic number.

It is an amenable number.

1260505 is a deficient number, since it is larger than the sum of its proper divisors (252107).

1260505 is an equidigital number, since it uses as much as digits as its factorization.

1260505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252106.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1260505 is about 1122.7221383762. The cubic root of 1260505 is about 108.0226575691.

The spelling of 1260505 in words is "one million, two hundred sixty thousand, five hundred five".