11947005 has 96 divisors (see below), whose sum is σ = 26417664. Its totient is φ = 4866048.

The previous prime is 11946989. The next prime is 11947007. The reversal of 11947005 is 50074911.

It is not a de Polignac number, because 11947005 - 2⁴ = 11946989 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11947005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11947007) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 123117 + ... + 123213.

It is an arithmetic number, because the mean of its divisors is an integer number (275184).

Almost surely, 2^11947005 is an apocalyptic number.

11947005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11947005 is an abundant number, since it is smaller than the sum of its proper divisors (14470659).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11947005 is a wasteful number, since it uses less digits than its factorization.

11947005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 11947005 is about 3456.4439818982. The cubic root of 11947005 is about 228.6053282124.

The spelling of 11947005 in words is "eleven million, nine hundred forty-seven thousand, five".