145139925 has 48 divisors (see below), whose sum is σ = 283731840. Its totient is φ = 64055040.

The previous prime is 145139909. The next prime is 145139933. The reversal of 145139925 is 529931541.

It is not a de Polignac number, because 145139925 - 2⁴ = 145139909 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 10459 + ... + 19991.

It is an arithmetic number, because the mean of its divisors is an integer number (5911080).

Almost surely, 2^145139925 is an apocalyptic number.

145139925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145139925 is a deficient number, since it is larger than the sum of its proper divisors (138591915).

145139925 is a wasteful number, since it uses less digits than its factorization.

145139925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9582 (or 9577 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 145139925 is about 12047.4032471732. The cubic root of 145139925 is about 525.5277233297.

The spelling of 145139925 in words is "one hundred forty-five million, one hundred thirty-nine thousand, nine hundred twenty-five".