11961147 has 8 divisors (see below), whose sum is σ = 17398080. Its totient is φ = 7249160.

The previous prime is 11961143. The next prime is 11961151. The reversal of 11961147 is 74116911.

It is an interprime number because it is at equal distance from previous prime (11961143) and next prime (11961151).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11961147 - 2² = 11961143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11961143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181197 + ... + 181262.

It is an arithmetic number, because the mean of its divisors is an integer number (2174760).

Almost surely, 2^11961147 is an apocalyptic number.

11961147 is a deficient number, since it is larger than the sum of its proper divisors (5436933).

11961147 is a wasteful number, since it uses less digits than its factorization.

11961147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362473.

The product of its digits is 1512, while the sum is 30.

The square root of 11961147 is about 3458.4891209891. The cubic root of 11961147 is about 228.6954947925.

The spelling of 11961147 in words is "eleven million, nine hundred sixty-one thousand, one hundred forty-seven".