197421245 has 24 divisors (see below), whose sum is σ = 276576768. Its totient is φ = 134887200.

The previous prime is 197421209. The next prime is 197421253. The reversal of 197421245 is 542124791.

It is not a de Polignac number, because 197421245 - 2⁶ = 197421181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74900 + ... + 77490.

It is an arithmetic number, because the mean of its divisors is an integer number (11524032).

Almost surely, 2^197421245 is an apocalyptic number.

It is an amenable number.

197421245 is a deficient number, since it is larger than the sum of its proper divisors (79155523).

197421245 is a wasteful number, since it uses less digits than its factorization.

197421245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921 (or 2914 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 197421245 is about 14050.6670660151. The cubic root of 197421245 is about 582.2792252181.

The spelling of 197421245 in words is "one hundred ninety-seven million, four hundred twenty-one thousand, two hundred forty-five".