145198725 has 48 divisors (see below), whose sum is σ = 275970432. Its totient is φ = 65986560.

The previous prime is 145198723. The next prime is 145198733. The reversal of 145198725 is 527891541.

It is not a de Polignac number, because 145198725 - 2¹ = 145198723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145198723) 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 47 ways as a sum of consecutive naturals, for example, 100609 + ... + 102041.

It is an arithmetic number, because the mean of its divisors is an integer number (5749384).

Almost surely, 2^145198725 is an apocalyptic number.

145198725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145198725 is a deficient number, since it is larger than the sum of its proper divisors (130771707).

145198725 is a wasteful number, since it uses less digits than its factorization.

145198725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646 (or 1641 counting only the distinct ones).

The product of its digits is 100800, while the sum is 42.

The square root of 145198725 is about 12049.8433599778. The cubic root of 145198725 is about 525.5986821146.

The spelling of 145198725 in words is "one hundred forty-five million, one hundred ninety-eight thousand, seven hundred twenty-five".