1261465 has 4 divisors (see below), whose sum is σ = 1513764. Its totient is φ = 1009168.

The previous prime is 1261459. The next prime is 1261487. The reversal of 1261465 is 5641621.

1261465 is nontrivially palindromic in base 2.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5641621 = 89 ⋅63389.

It can be written as a sum of positive squares in 2 ways, for example, as 974169 + 287296 = 987^2 + 536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1261465 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 126142 + ... + 126151.

It is an arithmetic number, because the mean of its divisors is an integer number (378441).

2^1261465 is an apocalyptic number.

It is an amenable number.

1261465 is a deficient number, since it is larger than the sum of its proper divisors (252299).

1261465 is an equidigital number, since it uses as much as digits as its factorization.

1261465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252298.

The product of its digits is 1440, while the sum is 25.

The square root of 1261465 is about 1123.1495893246. The cubic root of 1261465 is about 108.0500739448.

The spelling of 1261465 in words is "one million, two hundred sixty-one thousand, four hundred sixty-five".