11972775 has 24 divisors (see below), whose sum is σ = 20127184. Its totient is φ = 6278400.

The previous prime is 11972767. The next prime is 11972783. The reversal of 11972775 is 57727911.

It is an interprime number because it is at equal distance from previous prime (11972767) and next prime (11972783).

It is not a de Polignac number, because 11972775 - 2³ = 11972767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3267 + ... + 5883.

Almost surely, 2^11972775 is an apocalyptic number.

11972775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11972775 is a deficient number, since it is larger than the sum of its proper divisors (8154409).

11972775 is a wasteful number, since it uses less digits than its factorization.

11972775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691 (or 2686 counting only the distinct ones).

The product of its digits is 30870, while the sum is 39.

The square root of 11972775 is about 3460.1697935217. The cubic root of 11972775 is about 228.7695793806.

The spelling of 11972775 in words is "eleven million, nine hundred seventy-two thousand, seven hundred seventy-five".