145851503 has 4 divisors (see below), whose sum is σ = 166687440. Its totient is φ = 125015568.

The previous prime is 145851493. The next prime is 145851529. The reversal of 145851503 is 305158541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305158541 = 631 ⋅483611.

It is a cyclic number.

It is not a de Polignac number, because 145851503 - 2¹² = 145847407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145851503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145851583) 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 in 3 ways as a sum of consecutive naturals, for example, 10417958 + ... + 10417971.

It is an arithmetic number, because the mean of its divisors is an integer number (41671860).

Almost surely, 2^145851503 is an apocalyptic number.

145851503 is a deficient number, since it is larger than the sum of its proper divisors (20835937).

145851503 is an equidigital number, since it uses as much as digits as its factorization.

145851503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20835936.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 145851503 is about 12076.8995607316. The cubic root of 145851503 is about 526.3851591156.

The spelling of 145851503 in words is "one hundred forty-five million, eight hundred fifty-one thousand, five hundred three".