145511305 has 8 divisors (see below), whose sum is σ = 177073344. Its totient is φ = 114769200.

The previous prime is 145511281. The next prime is 145511309. The reversal of 145511305 is 503115541.

It is a happy number.

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

It is not a de Polignac number, because 145511305 - 2⁵ = 145511273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145511305.

It is not an unprimeable number, because it can be changed into a prime (145511309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204591 + ... + 205300.

It is an arithmetic number, because the mean of its divisors is an integer number (22134168).

Almost surely, 2^145511305 is an apocalyptic number.

It is an amenable number.

145511305 is a deficient number, since it is larger than the sum of its proper divisors (31562039).

145511305 is an equidigital number, since it uses as much as digits as its factorization.

145511305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409967.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 145511305 is about 12062.8066800393. The cubic root of 145511305 is about 525.9755767983.

Adding to 145511305 its reverse (503115541), we get a palindrome (648626846).

The spelling of 145511305 in words is "one hundred forty-five million, five hundred eleven thousand, three hundred five".