1151961 has 4 divisors (see below), whose sum is σ = 1535952. Its totient is φ = 767972.

The previous prime is 1151933. The next prime is 1151963. The reversal of 1151961 is 1691511.

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: 1691511 = 3 ⋅563837.

It is a cyclic number.

It is not a de Polignac number, because 1151961 - 2¹¹ = 1149913 is a prime.

It is a D-number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1151963) 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 3 ways as a sum of consecutive naturals, for example, 191991 + ... + 191996.

It is an arithmetic number, because the mean of its divisors is an integer number (383988).

2^1151961 is an apocalyptic number.

It is an amenable number.

1151961 is a deficient number, since it is larger than the sum of its proper divisors (383991).

1151961 is an equidigital number, since it uses as much as digits as its factorization.

1151961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383990.

The product of its digits is 270, while the sum is 24.

The square root of 1151961 is about 1073.2944609938. The cubic root of 1151961 is about 104.8284727815.

It can be divided in two parts, 1151 and 961, that added together give a palindrome (2112).

The spelling of 1151961 in words is "one million, one hundred fifty-one thousand, nine hundred sixty-one".