145705871 has 2 divisors, whose sum is σ = 145705872. Its totient is φ = 145705870.

The previous prime is 145705867. The next prime is 145705873. The reversal of 145705871 is 178507541.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (178507541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145705871 - 2² = 145705867 is a prime.

Together with 145705873, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145705873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72852935 + 72852936.

It is an arithmetic number, because the mean of its divisors is an integer number (72852936).

Almost surely, 2^145705871 is an apocalyptic number.

145705871 is a deficient number, since it is larger than the sum of its proper divisors (1).

145705871 is an equidigital number, since it uses as much as digits as its factorization.

145705871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39200, while the sum is 38.

The square root of 145705871 is about 12070.8686928489. The cubic root of 145705871 is about 526.2099031179.

The spelling of 145705871 in words is "one hundred forty-five million, seven hundred five thousand, eight hundred seventy-one".