1271925 has 18 divisors (see below), whose sum is σ = 2278562. Its totient is φ = 678240.

The previous prime is 1271903. The next prime is 1271927. The reversal of 1271925 is 5291721.

It can be written as a sum of positive squares in 3 ways, for example, as 194481 + 1077444 = 441^2 + 1038^2 .

It is not a de Polignac number, because 1271925 - 2⁷ = 1271797 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271927) 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 17 ways as a sum of consecutive naturals, for example, 2602 + ... + 3051.

2^1271925 is an apocalyptic number.

1271925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1271925 is a deficient number, since it is larger than the sum of its proper divisors (1006637).

1271925 is a wasteful number, since it uses less digits than its factorization.

1271925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5669 (or 5661 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 1271925 is about 1127.7965242011. The cubic root of 1271925 is about 108.3479007367.

The spelling of 1271925 in words is "one million, two hundred seventy-one thousand, nine hundred twenty-five".