145994291 has 4 divisors (see below), whose sum is σ = 147842400. Its totient is φ = 144146184.

The previous prime is 145994281. The next prime is 145994293. The reversal of 145994291 is 192499541.

145994291 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 145994291 - 2⁶ = 145994227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145994293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 923936 + ... + 924093.

It is an arithmetic number, because the mean of its divisors is an integer number (36960600).

Almost surely, 2^145994291 is an apocalyptic number.

145994291 is a deficient number, since it is larger than the sum of its proper divisors (1848109).

145994291 is an equidigital number, since it uses as much as digits as its factorization.

145994291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1848108.

The product of its digits is 116640, while the sum is 44.

The square root of 145994291 is about 12082.8097311842. The cubic root of 145994291 is about 526.5568793660.

The spelling of 145994291 in words is "one hundred forty-five million, nine hundred ninety-four thousand, two hundred ninety-one".