145529681 has 8 divisors (see below), whose sum is σ = 160011264. Its totient is φ = 131256720.

The previous prime is 145529677. The next prime is 145529689. The reversal of 145529681 is 186925541.

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 145529681 - 2² = 145529677 is a prime.

It is a super-2 number, since 2×145529681² = 42357776103923522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145529689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50690 + ... + 53483.

It is an arithmetic number, because the mean of its divisors is an integer number (20001408).

Almost surely, 2^145529681 is an apocalyptic number.

145529681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145529681 is a deficient number, since it is larger than the sum of its proper divisors (14481583).

145529681 is a wasteful number, since it uses less digits than its factorization.

145529681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104311.

The product of its digits is 86400, while the sum is 41.

The square root of 145529681 is about 12063.5683361102. The cubic root of 145529681 is about 525.9977169346.

The spelling of 145529681 in words is "one hundred forty-five million, five hundred twenty-nine thousand, six hundred eighty-one".