1151261 has 4 divisors (see below), whose sum is σ = 1168512. Its totient is φ = 1134012.

The previous prime is 1151251. The next prime is 1151287. The reversal of 1151261 is 1621511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1621511 = 17 ⋅95383.

It is a cyclic number.

It is not a de Polignac number, because 1151261 - 2¹⁴ = 1134877 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8525 + ... + 8658.

It is an arithmetic number, because the mean of its divisors is an integer number (292128).

2^1151261 is an apocalyptic number.

It is an amenable number.

1151261 is a deficient number, since it is larger than the sum of its proper divisors (17251).

1151261 is an equidigital number, since it uses as much as digits as its factorization.

1151261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17250.

The product of its digits is 60, while the sum is 17.

The square root of 1151261 is about 1072.9683126728. The cubic root of 1151261 is about 104.8072351414.

Adding to 1151261 its reverse (1621511), we get a palindrome (2772772).

The spelling of 1151261 in words is "one million, one hundred fifty-one thousand, two hundred sixty-one".