1275145 has 8 divisors (see below), whose sum is σ = 1539720. Its totient is φ = 1013760.

The previous prime is 1275133. The next prime is 1275173. The reversal of 1275145 is 5415721.

It can be written as a sum of positive squares in 4 ways, for example, as 153664 + 1121481 = 392^2 + 1059^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1275145 - 2⁹ = 1274633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201 + ... + 1609.

It is an arithmetic number, because the mean of its divisors is an integer number (192465).

2^1275145 is an apocalyptic number.

It is an amenable number.

1275145 is a deficient number, since it is larger than the sum of its proper divisors (264575).

1275145 is a wasteful number, since it uses less digits than its factorization.

1275145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595.

The product of its digits is 1400, while the sum is 25.

The square root of 1275145 is about 1129.2231843174. The cubic root of 1275145 is about 108.4392547200.

It can be divided in two parts, 12 and 75145, that added together give a palindrome (75157).

The spelling of 1275145 in words is "one million, two hundred seventy-five thousand, one hundred forty-five".