1171261 has 16 divisors (see below), whose sum is σ = 1472128. Its totient is φ = 907200.

The previous prime is 1171259. The next prime is 1171267. The reversal of 1171261 is 1621711.

It is not a de Polignac number, because 1171261 - 2¹ = 1171259 is a prime.

It is an Ulam number.

It is a deceptive number, since it divides R_1171260.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5446 + ... + 5656.

It is an arithmetic number, because the mean of its divisors is an integer number (92008).

2^1171261 is an apocalyptic number.

It is an amenable number.

1171261 is a deficient number, since it is larger than the sum of its proper divisors (300867).

1171261 is a wasteful number, since it uses less digits than its factorization.

1171261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292.

The product of its digits is 84, while the sum is 19.

The square root of 1171261 is about 1082.2481231215. The cubic root of 1171261 is about 105.4106668737.

Adding to 1171261 its reverse (1621711), we get a palindrome (2792972).

It can be divided in two parts, 117 and 1261, that added together give a triangular number (1378 = T₅₂).

The spelling of 1171261 in words is "one million, one hundred seventy-one thousand, two hundred sixty-one".