145781248 has 20 divisors (see below), whose sum is σ = 291278790. Its totient is φ = 72890368.

The previous prime is 145781191. The next prime is 145781249. The reversal of 145781248 is 842187541.

It can be written as a sum of positive squares in only one way, i.e., 142850304 + 2930944 = 11952^2 + 1712^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 145781248.

It is not an unprimeable number, because it can be changed into a prime (145781249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141853 + ... + 142876.

Almost surely, 2^145781248 is an apocalyptic number.

It is an amenable number.

145781248 is a deficient number, since it is larger than the sum of its proper divisors (145497542).

145781248 is an frugal number, since it uses more digits than its factorization.

145781248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284747 (or 284731 counting only the distinct ones).

The product of its digits is 71680, while the sum is 40.

The square root of 145781248 is about 12073.9905582206. The cubic root of 145781248 is about 526.3006276390.

The spelling of 145781248 in words is "one hundred forty-five million, seven hundred eighty-one thousand, two hundred forty-eight".