145969522 has 4 divisors (see below), whose sum is σ = 218954286. Its totient is φ = 72984760.

The previous prime is 145969517. The next prime is 145969529. The reversal of 145969522 is 225969541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 225969541 = 7 ⋅32281363.

It can be written as a sum of positive squares in only one way, i.e., 82464561 + 63504961 = 9081^2 + 7969^2 .

It is not an unprimeable number, because it can be changed into a prime (145969529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36492379 + ... + 36492382.

Almost surely, 2^145969522 is an apocalyptic number.

145969522 is a deficient number, since it is larger than the sum of its proper divisors (72984764).

145969522 is an equidigital number, since it uses as much as digits as its factorization.

145969522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72984763.

The product of its digits is 194400, while the sum is 43.

The square root of 145969522 is about 12081.7847191547. The cubic root of 145969522 is about 526.5270996057.

The spelling of 145969522 in words is "one hundred forty-five million, nine hundred sixty-nine thousand, five hundred twenty-two".