11971455 has 8 divisors (see below), whose sum is σ = 19154352. Its totient is φ = 6384768.

The previous prime is 11971447. The next prime is 11971457. The reversal of 11971455 is 55417911.

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

It is not a de Polignac number, because 11971455 - 2³ = 11971447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11971457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399034 + ... + 399063.

It is an arithmetic number, because the mean of its divisors is an integer number (2394294).

Almost surely, 2^11971455 is an apocalyptic number.

11971455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11971455 is a deficient number, since it is larger than the sum of its proper divisors (7182897).

11971455 is an equidigital number, since it uses as much as digits as its factorization.

11971455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798105.

The product of its digits is 6300, while the sum is 33.

The square root of 11971455 is about 3459.9790461793. The cubic root of 11971455 is about 228.7611717796.

The spelling of 11971455 in words is "eleven million, nine hundred seventy-one thousand, four hundred fifty-five".