1260905 has 4 divisors (see below), whose sum is σ = 1513092. Its totient is φ = 1008720.

The previous prime is 1260901. The next prime is 1260911. The reversal of 1260905 is 5090621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 173056 + 1087849 = 416^2 + 1043^2 .

It is not a de Polignac number, because 1260905 - 2² = 1260901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260901) 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, 126086 + ... + 126095.

It is an arithmetic number, because the mean of its divisors is an integer number (378273).

2^1260905 is an apocalyptic number.

It is an amenable number.

1260905 is a deficient number, since it is larger than the sum of its proper divisors (252187).

1260905 is an equidigital number, since it uses as much as digits as its factorization.

1260905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252186.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1260905 is about 1122.9002627126. The cubic root of 1260905 is about 108.0340827501.

The spelling of 1260905 in words is "one million, two hundred sixty thousand, nine hundred five".