145661313 has 8 divisors (see below), whose sum is σ = 221960128. Its totient is φ = 83235024.

The previous prime is 145661309. The next prime is 145661333. The reversal of 145661313 is 313166541.

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

It is not a de Polignac number, because 145661313 - 2² = 145661309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145661333) 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, 3468106 + ... + 3468147.

It is an arithmetic number, because the mean of its divisors is an integer number (27745016).

Almost surely, 2^145661313 is an apocalyptic number.

It is an amenable number.

145661313 is a deficient number, since it is larger than the sum of its proper divisors (76298815).

145661313 is an equidigital number, since it uses as much as digits as its factorization.

145661313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6936263.

The product of its digits is 6480, while the sum is 30.

The square root of 145661313 is about 12069.0228684844. The cubic root of 145661313 is about 526.1562579418.

The spelling of 145661313 in words is "one hundred forty-five million, six hundred sixty-one thousand, three hundred thirteen".