145196509 has 8 divisors (see below), whose sum is σ = 148829472. Its totient is φ = 141575280.

The previous prime is 145196497. The next prime is 145196551. The reversal of 145196509 is 905691541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145196509 - 2¹¹ = 145194461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145196599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25494 + ... + 30664.

It is an arithmetic number, because the mean of its divisors is an integer number (18603684).

Almost surely, 2^145196509 is an apocalyptic number.

It is an amenable number.

145196509 is a deficient number, since it is larger than the sum of its proper divisors (3632963).

145196509 is an equidigital number, since it uses as much as digits as its factorization.

145196509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 145196509 is about 12049.7514082242. The cubic root of 145196509 is about 525.5960082330.

The spelling of 145196509 in words is "one hundred forty-five million, one hundred ninety-six thousand, five hundred nine".