145197 has 24 divisors (see below), whose sum is σ = 242424. Its totient is φ = 82944.

The previous prime is 145193. The next prime is 145207. The reversal of 145197 is 791541.

It can be written as a sum of positive squares in 4 ways, for example, as 19881 + 125316 = 141^2 + 354^2 .

It is not a de Polignac number, because 145197 - 2² = 145193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145193) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1953 + ... + 2025.

It is an arithmetic number, because the mean of its divisors is an integer number (10101).

2¹⁴⁵¹⁹⁷ is an apocalyptic number.

145197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

145197 is a deficient number, since it is larger than the sum of its proper divisors (97227).

145197 is a wasteful number, since it uses less digits than its factorization.

145197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 106 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 145197 is about 381.0472411657. The cubic root of 145197 is about 52.5596600688.

The spelling of 145197 in words is "one hundred forty-five thousand, one hundred ninety-seven".