11990145 has 8 divisors (see below), whose sum is σ = 19184256. Its totient is φ = 6394736.

The previous prime is 11990141. The next prime is 11990171. The reversal of 11990145 is 54109911.

11990145 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 11990145 - 2² = 11990141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11990141) 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, 399657 + ... + 399686.

It is an arithmetic number, because the mean of its divisors is an integer number (2398032).

Almost surely, 2^11990145 is an apocalyptic number.

11990145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11990145 is a deficient number, since it is larger than the sum of its proper divisors (7194111).

11990145 is an equidigital number, since it uses as much as digits as its factorization.

11990145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799351.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 11990145 is about 3462.6788762460. The cubic root of 11990145 is about 228.8801582413.

The spelling of 11990145 in words is "eleven million, nine hundred ninety thousand, one hundred forty-five".