199145925 has 48 divisors (see below), whose sum is σ = 399111360. Its totient is φ = 96552000.

The previous prime is 199145911. The next prime is 199145981. The reversal of 199145925 is 529541991.

199145925 is a `hidden beast` number, since 199 + 1 + 459 + 2 + 5 = 666.

It is not a de Polignac number, because 199145925 - 2⁶ = 199145861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5986 + ... + 20835.

It is an arithmetic number, because the mean of its divisors is an integer number (8314820).

Almost surely, 2^199145925 is an apocalyptic number.

199145925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199145925 is an abundant number, since it is smaller than the sum of its proper divisors (199965435).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199145925 is a wasteful number, since it uses less digits than its factorization.

199145925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26851 (or 26840 counting only the distinct ones).

The product of its digits is 145800, while the sum is 45.

The square root of 199145925 is about 14111.9072063276. The cubic root of 199145925 is about 583.9699163915.

The spelling of 199145925 in words is "one hundred ninety-nine million, one hundred forty-five thousand, nine hundred twenty-five".