11972155 has 8 divisors (see below), whose sum is σ = 15471792. Its totient is φ = 8840928.

The previous prime is 11972153. The next prime is 11972159. The reversal of 11972155 is 55127911.

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 11972155 - 2¹ = 11972153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11972153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92029 + ... + 92158.

It is an arithmetic number, because the mean of its divisors is an integer number (1933974).

Almost surely, 2^11972155 is an apocalyptic number.

11972155 is a deficient number, since it is larger than the sum of its proper divisors (3499637).

11972155 is a wasteful number, since it uses less digits than its factorization.

11972155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184205.

The product of its digits is 3150, while the sum is 31.

The square root of 11972155 is about 3460.0802013826. The cubic root of 11972155 is about 228.7656304328.

The spelling of 11972155 in words is "eleven million, nine hundred seventy-two thousand, one hundred fifty-five".