145249903 has 8 divisors (see below), whose sum is σ = 147996288. Its totient is φ = 142520664.

The previous prime is 145249859. The next prime is 145249933. The reversal of 145249903 is 309942541.

145249903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145249903 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 (145249933) 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, 13500 + ... + 21742.

It is an arithmetic number, because the mean of its divisors is an integer number (18499536).

Almost surely, 2^145249903 is an apocalyptic number.

145249903 is a deficient number, since it is larger than the sum of its proper divisors (2746385).

145249903 is an equidigital number, since it uses as much as digits as its factorization.

145249903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8573.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 145249903 is about 12051.9667689552. The cubic root of 145249903 is about 525.6604272151.

The spelling of 145249903 in words is "one hundred forty-five million, two hundred forty-nine thousand, nine hundred three".