145256506 has 4 divisors (see below), whose sum is σ = 217884762. Its totient is φ = 72628252.

The previous prime is 145256497. The next prime is 145256521. The reversal of 145256506 is 605652541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 86657481 + 58599025 = 9309^2 + 7655^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 36314125 + ... + 36314128.

Almost surely, 2^145256506 is an apocalyptic number.

145256506 is a deficient number, since it is larger than the sum of its proper divisors (72628256).

145256506 is an equidigital number, since it uses as much as digits as its factorization.

145256506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72628255.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 145256506 is about 12052.2407045329. The cubic root of 145256506 is about 525.6683925290.

The spelling of 145256506 in words is "one hundred forty-five million, two hundred fifty-six thousand, five hundred six".