145209794 has 8 divisors (see below), whose sum is σ = 218750220. Its totient is φ = 72293056.

The previous prime is 145209791. The next prime is 145209809. The reversal of 145209794 is 497902541.

145209794 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 142444225 + 2765569 = 11935^2 + 1663^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (145209791) 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, 155339 + ... + 156270.

Almost surely, 2^145209794 is an apocalyptic number.

145209794 is a deficient number, since it is larger than the sum of its proper divisors (73540426).

145209794 is a wasteful number, since it uses less digits than its factorization.

145209794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311844.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 145209794 is about 12050.3026518009. The cubic root of 145209794 is about 525.6120378425.

The spelling of 145209794 in words is "one hundred forty-five million, two hundred nine thousand, seven hundred ninety-four".