195412021 has 16 divisors (see below), whose sum is σ = 227209600. Its totient is φ = 164602368.

The previous prime is 195411989. The next prime is 195412031. The reversal of 195412021 is 120214591.

It is a happy number.

It is not a de Polignac number, because 195412021 - 2⁵ = 195411989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195412031) 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 15 ways as a sum of consecutive naturals, for example, 193165 + ... + 194173.

It is an arithmetic number, because the mean of its divisors is an integer number (14200600).

Almost surely, 2^195412021 is an apocalyptic number.

It is an amenable number.

195412021 is a deficient number, since it is larger than the sum of its proper divisors (31797579).

195412021 is a wasteful number, since it uses less digits than its factorization.

195412021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 195412021 is about 13978.9849774581. The cubic root of 195412021 is about 580.2971337216.

The spelling of 195412021 in words is "one hundred ninety-five million, four hundred twelve thousand, twenty-one".