145731571 has 2 divisors, whose sum is σ = 145731572. Its totient is φ = 145731570.

The previous prime is 145731569. The next prime is 145731629. The reversal of 145731571 is 175137541.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (175137541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145731571 - 2¹ = 145731569 is a prime.

It is a super-2 number, since 2×145731571² = 42475381572256082, which contains 22 as substring.

Together with 145731569, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (145731511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72865785 + 72865786.

It is an arithmetic number, because the mean of its divisors is an integer number (72865786).

Almost surely, 2^145731571 is an apocalyptic number.

145731571 is a deficient number, since it is larger than the sum of its proper divisors (1).

145731571 is an equidigital number, since it uses as much as digits as its factorization.

145731571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 34.

The square root of 145731571 is about 12071.9331923267. The cubic root of 145731571 is about 526.2408394130.

The spelling of 145731571 in words is "one hundred forty-five million, seven hundred thirty-one thousand, five hundred seventy-one".