197125261 has 4 divisors (see below), whose sum is σ = 197986300. Its totient is φ = 196264224.

The previous prime is 197125259. The next prime is 197125277. The reversal of 197125261 is 162521791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 162521791 = 11467 ⋅14173.

It can be written as a sum of positive squares in 2 ways, for example, as 188540361 + 8584900 = 13731^2 + 2930^2 .

It is a cyclic number.

It is not a de Polignac number, because 197125261 - 2¹ = 197125259 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 (197125231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430176 + ... + 430633.

It is an arithmetic number, because the mean of its divisors is an integer number (49496575).

Almost surely, 2^197125261 is an apocalyptic number.

It is an amenable number.

197125261 is a deficient number, since it is larger than the sum of its proper divisors (861039).

197125261 is an equidigital number, since it uses as much as digits as its factorization.

197125261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861038.

The product of its digits is 7560, while the sum is 34.

The square root of 197125261 is about 14040.1303768875. The cubic root of 197125261 is about 581.9880854345.

The spelling of 197125261 in words is "one hundred ninety-seven million, one hundred twenty-five thousand, two hundred sixty-one".