1211265 has 24 divisors (see below), whose sum is σ = 2291328. Its totient is φ = 587040.

The previous prime is 1211261. The next prime is 1211279. The reversal of 1211265 is 5621121.

It is not a de Polignac number, because 1211265 - 2² = 1211261 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1211261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 729 + ... + 1718.

It is an arithmetic number, because the mean of its divisors is an integer number (95472).

2^1211265 is an apocalyptic number.

1211265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211265 is a deficient number, since it is larger than the sum of its proper divisors (1080063).

1211265 is a wasteful number, since it uses less digits than its factorization.

1211265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469 (or 2466 counting only the distinct ones).

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

The square root of 1211265 is about 1100.5748497944. The cubic root of 1211265 is about 106.5973453667.

Adding to 1211265 its reverse (5621121), we get a palindrome (6832386).

The spelling of 1211265 in words is "one million, two hundred eleven thousand, two hundred sixty-five".