1261063 has 4 divisors (see below), whose sum is σ = 1267600. Its totient is φ = 1254528.

The previous prime is 1261033. The next prime is 1261069. The reversal of 1261063 is 3601621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3601621 = 19 ⋅189559.

It is a 7-Lehmer number, since φ(1261063) divides (1261063-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 1261063 - 2⁹ = 1260551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1261063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261069) 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 3 ways as a sum of consecutive naturals, for example, 2970 + ... + 3367.

It is an arithmetic number, because the mean of its divisors is an integer number (316900).

2^1261063 is an apocalyptic number.

1261063 is a deficient number, since it is larger than the sum of its proper divisors (6537).

1261063 is an equidigital number, since it uses as much as digits as its factorization.

1261063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6536.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 1261063 is about 1122.9706140412. The cubic root of 1261063 is about 108.0385950309.

Adding to 1261063 its reverse (3601621), we get a palindrome (4862684).

It can be divided in two parts, 12610 and 63, that multiplied together give a triangular number (794430 = T₁₂₆₀).

The spelling of 1261063 in words is "one million, two hundred sixty-one thousand, sixty-three".