145771565 has 8 divisors (see below), whose sum is σ = 177537120. Its totient is φ = 114876432.

The previous prime is 145771559. The next prime is 145771621. The reversal of 145771565 is 565177541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145771565 - 2¹⁸ = 145509421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217235 + ... + 217904.

It is an arithmetic number, because the mean of its divisors is an integer number (22192140).

Almost surely, 2^145771565 is an apocalyptic number.

It is an amenable number.

145771565 is a deficient number, since it is larger than the sum of its proper divisors (31765555).

145771565 is an equidigital number, since it uses as much as digits as its factorization.

145771565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435211.

The product of its digits is 147000, while the sum is 41.

The square root of 145771565 is about 12073.5895656594. The cubic root of 145771565 is about 526.2889748330.

The spelling of 145771565 in words is "one hundred forty-five million, seven hundred seventy-one thousand, five hundred sixty-five".