1262561 has 4 divisors (see below), whose sum is σ = 1289472. Its totient is φ = 1235652.

The previous prime is 1262557. The next prime is 1262563. The reversal of 1262561 is 1652621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1652621 = 17 ⋅97213.

It is a cyclic number.

It is not a de Polignac number, because 1262561 - 2² = 1262557 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 (1262563) 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, 13385 + ... + 13478.

It is an arithmetic number, because the mean of its divisors is an integer number (322368).

2^1262561 is an apocalyptic number.

It is an amenable number.

1262561 is a deficient number, since it is larger than the sum of its proper divisors (26911).

1262561 is an equidigital number, since it uses as much as digits as its factorization.

1262561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26910.

The product of its digits is 720, while the sum is 23.

The square root of 1262561 is about 1123.6373970281. The cubic root of 1262561 is about 108.0813573074.

The spelling of 1262561 in words is "one million, two hundred sixty-two thousand, five hundred sixty-one".