145781922 has 32 divisors (see below), whose sum is σ = 342538560. Its totient is φ = 40777920.

The previous prime is 145781917. The next prime is 145781929. The reversal of 145781922 is 229187541.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (145781929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84097 + ... + 85812.

It is an arithmetic number, because the mean of its divisors is an integer number (10704330).

Almost surely, 2^145781922 is an apocalyptic number.

145781922 is an abundant number, since it is smaller than the sum of its proper divisors (196756638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145781922 is a wasteful number, since it uses less digits than its factorization.

145781922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169938.

The product of its digits is 40320, while the sum is 39.

The square root of 145781922 is about 12074.0184694243. The cubic root of 145781922 is about 526.3014387312.

The spelling of 145781922 in words is "one hundred forty-five million, seven hundred eighty-one thousand, nine hundred twenty-two".