145947871 has 2 divisors, whose sum is σ = 145947872. Its totient is φ = 145947870.

The previous prime is 145947859. The next prime is 145947889. The reversal of 145947871 is 178749541.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 145947871 - 2¹⁵ = 145915103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145947821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72973935 + 72973936.

It is an arithmetic number, because the mean of its divisors is an integer number (72973936).

Almost surely, 2^145947871 is an apocalyptic number.

145947871 is a deficient number, since it is larger than the sum of its proper divisors (1).

145947871 is an equidigital number, since it uses as much as digits as its factorization.

145947871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 46.

The square root of 145947871 is about 12080.8886676436. Note that the first 3 decimals coincide. The cubic root of 145947871 is about 526.5010658562.

The spelling of 145947871 in words is "one hundred forty-five million, nine hundred forty-seven thousand, eight hundred seventy-one".