145889925 has 12 divisors (see below), whose sum is σ = 241204800. Its totient is φ = 77807920.

The previous prime is 145889879. The next prime is 145889941. The reversal of 145889925 is 529988541.

It is not a de Polignac number, because 145889925 - 2¹² = 145885829 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 972525 + ... + 972674.

It is an arithmetic number, because the mean of its divisors is an integer number (20100400).

Almost surely, 2^145889925 is an apocalyptic number.

145889925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145889925 is a deficient number, since it is larger than the sum of its proper divisors (95314875).

145889925 is a wasteful number, since it uses less digits than its factorization.

145889925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945212 (or 1945207 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 51.

The square root of 145889925 is about 12078.4901788262. The cubic root of 145889925 is about 526.4313773455.

The spelling of 145889925 in words is "one hundred forty-five million, eight hundred eighty-nine thousand, nine hundred twenty-five".