1275161 has 4 divisors (see below), whose sum is σ = 1277712. Its totient is φ = 1272612.

The previous prime is 1275133. The next prime is 1275173. The reversal of 1275161 is 1615721.

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: 1615721 = 829 ⋅1949.

It is a cyclic number.

It is not a de Polignac number, because 1275161 - 2¹⁰ = 1274137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275121) 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, 251 + ... + 1616.

It is an arithmetic number, because the mean of its divisors is an integer number (319428).

2^1275161 is an apocalyptic number.

It is an amenable number.

1275161 is a deficient number, since it is larger than the sum of its proper divisors (2551).

1275161 is an equidigital number, since it uses as much as digits as its factorization.

1275161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550.

The product of its digits is 420, while the sum is 23.

The square root of 1275161 is about 1129.2302688115. The cubic root of 1275161 is about 108.4397082686.

The spelling of 1275161 in words is "one million, two hundred seventy-five thousand, one hundred sixty-one".