11957005 has 4 divisors (see below), whose sum is σ = 14348412. Its totient is φ = 9565600.

The previous prime is 11956993. The next prime is 11957009. The reversal of 11957005 is 50075911.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6853924 + 5103081 = 2618^2 + 2259^2 .

It is not a de Polignac number, because 11957005 - 2¹³ = 11948813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11957009) 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 3 ways as a sum of consecutive naturals, for example, 1195696 + ... + 1195705.

It is an arithmetic number, because the mean of its divisors is an integer number (3587103).

Almost surely, 2^11957005 is an apocalyptic number.

It is an amenable number.

11957005 is a deficient number, since it is larger than the sum of its proper divisors (2391407).

11957005 is an equidigital number, since it uses as much as digits as its factorization.

11957005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2391406.

The product of its (nonzero) digits is 1575, while the sum is 28.

The square root of 11957005 is about 3457.8902527408. The cubic root of 11957005 is about 228.6690935870.

The spelling of 11957005 in words is "eleven million, nine hundred fifty-seven thousand, five".