1231275 has 12 divisors (see below), whose sum is σ = 2035832. Its totient is φ = 656640.

The previous prime is 1231267. The next prime is 1231277. The reversal of 1231275 is 5721321.

It is not a de Polignac number, because 1231275 - 2³ = 1231267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231277) 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 11 ways as a sum of consecutive naturals, for example, 8134 + ... + 8283.

2^1231275 is an apocalyptic number.

1231275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1231275 is a deficient number, since it is larger than the sum of its proper divisors (804557).

1231275 is a wasteful number, since it uses less digits than its factorization.

1231275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16430 (or 16425 counting only the distinct ones).

The product of its digits is 420, while the sum is 21.

The square root of 1231275 is about 1109.6283161492. The cubic root of 1231275 is about 107.1811355292.

Adding to 1231275 its reverse (5721321), we get a palindrome (6952596).

The spelling of 1231275 in words is "one million, two hundred thirty-one thousand, two hundred seventy-five".