145897 has 2 divisors, whose sum is σ = 145898. Its totient is φ = 145896.

The previous prime is 145879. The next prime is 145903. The reversal of 145897 is 798541.

It is a happy number.

Together with previous prime (145879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114921 + 30976 = 339^2 + 176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145897 is a prime.

It is not a weakly prime, because it can be changed into another prime (145807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72948 + 72949.

It is an arithmetic number, because the mean of its divisors is an integer number (72949).

2¹⁴⁵⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

145897 is a deficient number, since it is larger than the sum of its proper divisors (1).

145897 is an equidigital number, since it uses as much as digits as its factorization.

145897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 145897 is about 381.9646580510. The cubic root of 145897 is about 52.6439887053.

The spelling of 145897 in words is "one hundred forty-five thousand, eight hundred ninety-seven".