1265553 has 6 divisors (see below), whose sum is σ = 1828034. Its totient is φ = 843696.

The previous prime is 1265549. The next prime is 1265557. The reversal of 1265553 is 3555621.

1265553 is a `hidden beast` number, since 1 + 2 + 655 + 5 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (1265549) and next prime (1265557).

It can be written as a sum of positive squares in only one way, i.e., 1046529 + 219024 = 1023^2 + 468^2 .

It is not a de Polignac number, because 1265553 - 2² = 1265549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1265557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70300 + ... + 70317.

2^1265553 is an apocalyptic number.

It is an amenable number.

1265553 is a deficient number, since it is larger than the sum of its proper divisors (562481).

1265553 is a wasteful number, since it uses less digits than its factorization.

1265553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140623 (or 140620 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 1265553 is about 1124.9679995449. The cubic root of 1265553 is about 108.1666665348.

The spelling of 1265553 in words is "one million, two hundred sixty-five thousand, five hundred fifty-three".