145242794 has 4 divisors (see below), whose sum is σ = 217864194. Its totient is φ = 72621396.

The previous prime is 145242793. The next prime is 145242803. The reversal of 145242794 is 497242541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 497242541 = 857 ⋅580213.

It can be written as a sum of positive squares in only one way, i.e., 81450625 + 63792169 = 9025^2 + 7987^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (145242791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36310697 + ... + 36310700.

Almost surely, 2^145242794 is an apocalyptic number.

145242794 is a deficient number, since it is larger than the sum of its proper divisors (72621400).

145242794 is an equidigital number, since it uses as much as digits as its factorization.

145242794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72621399.

The product of its digits is 80640, while the sum is 38.

The square root of 145242794 is about 12051.6718342311. The cubic root of 145242794 is about 525.6518512347.

The spelling of 145242794 in words is "one hundred forty-five million, two hundred forty-two thousand, seven hundred ninety-four".