1265121 has 24 divisors (see below), whose sum is σ = 2149056. Its totient is φ = 707040.

The previous prime is 1265119. The next prime is 1265129. The reversal of 1265121 is 1215621.

1265121 is a `hidden beast` number, since 12 + 651 + 2 + 1 = 666.

It is not a de Polignac number, because 1265121 - 2¹ = 1265119 is a prime.

It is a super-2 number, since 2×1265121² = 3201062289282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1265094 and 1265103.

It is not an unprimeable number, because it can be changed into a prime (1265129) 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 23 ways as a sum of consecutive naturals, for example, 796 + ... + 1778.

It is an arithmetic number, because the mean of its divisors is an integer number (89544).

2^1265121 is an apocalyptic number.

1265121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1265121 is a deficient number, since it is larger than the sum of its proper divisors (883935).

1265121 is a wasteful number, since it uses less digits than its factorization.

1265121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1010 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 1265121 is about 1124.7759776951. The cubic root of 1265121 is about 108.1543574710.

The spelling of 1265121 in words is "one million, two hundred sixty-five thousand, one hundred twenty-one".