1261205 has 16 divisors (see below), whose sum is σ = 1724544. Its totient is φ = 876480.

The previous prime is 1261199. The next prime is 1261217. The reversal of 1261205 is 5021621.

It is not a de Polignac number, because 1261205 - 2¹⁴ = 1244821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 767 + ... + 1763.

It is an arithmetic number, because the mean of its divisors is an integer number (107784).

2^1261205 is an apocalyptic number.

It is an amenable number.

1261205 is a deficient number, since it is larger than the sum of its proper divisors (463339).

1261205 is a wasteful number, since it uses less digits than its factorization.

1261205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1261205 is about 1123.0338374243. The cubic root of 1261205 is about 108.0426500502.

Adding to 1261205 its reverse (5021621), we get a palindrome (6282826).

It can be divided in two parts, 126 and 1205, that added together give a palindrome (1331).

The spelling of 1261205 in words is "one million, two hundred sixty-one thousand, two hundred five".