1265055 has 48 divisors (see below), whose sum is σ = 2413152. Its totient is φ = 563200.

The previous prime is 1265053. The next prime is 1265063. The reversal of 1265055 is 5505621.

1265055 = 501² + 502² + ... + 505².

It is not a de Polignac number, because 1265055 - 2¹ = 1265053 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265051) 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 47 ways as a sum of consecutive naturals, for example, 30835 + ... + 30875.

It is an arithmetic number, because the mean of its divisors is an integer number (50274).

2^1265055 is an apocalyptic number.

1265055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1265055 is a deficient number, since it is larger than the sum of its proper divisors (1148097).

1265055 is a wasteful number, since it uses less digits than its factorization.

1265055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1265055 is about 1124.7466381368. The cubic root of 1265055 is about 108.1524766728.

The spelling of 1265055 in words is "one million, two hundred sixty-five thousand, fifty-five".