195457 has 2 divisors, whose sum is σ = 195458. Its totient is φ = 195456.

The previous prime is 195443. The next prime is 195469. The reversal of 195457 is 754591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103041 + 92416 = 321^2 + 304^2 .

It is a cyclic number.

It is not a de Polignac number, because 195457 - 2⁷ = 195329 is a prime.

195457 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (195407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97728 + 97729.

It is an arithmetic number, because the mean of its divisors is an integer number (97729).

2¹⁹⁵⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

195457 is a deficient number, since it is larger than the sum of its proper divisors (1).

195457 is an equidigital number, since it uses as much as digits as its factorization.

195457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6300, while the sum is 31.

The square root of 195457 is about 442.1051911028. The cubic root of 195457 is about 58.0341653641.

It can be divided in two parts, 19 and 5457, that added together give a square (5476 = 74²).

The spelling of 195457 in words is "one hundred ninety-five thousand, four hundred fifty-seven".