145508493 has 12 divisors (see below), whose sum is σ = 210084000. Its totient is φ = 89543376.

The previous prime is 145508477. The next prime is 145508497. The reversal of 145508493 is 394805541.

It is not a de Polignac number, because 145508493 - 2⁴ = 145508477 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145508497) 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 11 ways as a sum of consecutive naturals, for example, 142993 + ... + 144006.

It is an arithmetic number, because the mean of its divisors is an integer number (17507000).

Almost surely, 2^145508493 is an apocalyptic number.

145508493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

145508493 is a deficient number, since it is larger than the sum of its proper divisors (64575507).

145508493 is a wasteful number, since it uses less digits than its factorization.

145508493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287028 (or 287015 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 145508493 is about 12062.6901228540. The cubic root of 145508493 is about 525.9721886243.

The spelling of 145508493 in words is "one hundred forty-five million, five hundred eight thousand, four hundred ninety-three".