197425257 has 8 divisors (see below), whose sum is σ = 277088160. Its totient is φ = 124689600.

The previous prime is 197425247. The next prime is 197425259. The reversal of 197425257 is 752524791.

197425257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197425257 - 2⁸ = 197425001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197425259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1731744 + ... + 1731857.

It is an arithmetic number, because the mean of its divisors is an integer number (34636020).

Almost surely, 2^197425257 is an apocalyptic number.

It is an amenable number.

197425257 is a deficient number, since it is larger than the sum of its proper divisors (79662903).

197425257 is a wasteful number, since it uses less digits than its factorization.

197425257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3463623.

The product of its digits is 176400, while the sum is 42.

The square root of 197425257 is about 14050.8098343120. The cubic root of 197425257 is about 582.2831695562.

The spelling of 197425257 in words is "one hundred ninety-seven million, four hundred twenty-five thousand, two hundred fifty-seven".