1295661 has 4 divisors (see below), whose sum is σ = 1727552. Its totient is φ = 863772.

The previous prime is 1295653. The next prime is 1295681. The reversal of 1295661 is 1665921.

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: 1665921 = 3 ⋅555307.

It is not a de Polignac number, because 1295661 - 2³ = 1295653 is a prime.

It is a D-number.

It is a Duffinian number.

1295661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1295611) 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, 215941 + ... + 215946.

It is an arithmetic number, because the mean of its divisors is an integer number (431888).

2^1295661 is an apocalyptic number.

It is an amenable number.

1295661 is a deficient number, since it is larger than the sum of its proper divisors (431891).

1295661 is an equidigital number, since it uses as much as digits as its factorization.

1295661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431890.

The product of its digits is 3240, while the sum is 30.

The square root of 1295661 is about 1138.2710573497. The cubic root of 1295661 is about 109.0177285082.

The spelling of 1295661 in words is "one million, two hundred ninety-five thousand, six hundred sixty-one".