189901245 has 16 divisors (see below), whose sum is σ = 305884800. Its totient is φ = 100599744.

The previous prime is 189901223. The next prime is 189901259. The reversal of 189901245 is 542109981.

It is not a de Polignac number, because 189901245 - 2¹⁵ = 189868477 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40249 + ... + 44718.

It is an arithmetic number, because the mean of its divisors is an integer number (19117800).

Almost surely, 2^189901245 is an apocalyptic number.

189901245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189901245 is a deficient number, since it is larger than the sum of its proper divisors (115983555).

189901245 is a wasteful number, since it uses less digits than its factorization.

189901245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85124.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 189901245 is about 13780.4660661387. The cubic root of 189901245 is about 574.7900884696.

The spelling of 189901245 in words is "one hundred eighty-nine million, nine hundred one thousand, two hundred forty-five".