145251505 has 8 divisors (see below), whose sum is σ = 199202112. Its totient is φ = 99601008.

The previous prime is 145251503. The next prime is 145251521. The reversal of 145251505 is 505152541.

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 145251505 - 2¹ = 145251503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145251503) 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, 2074987 + ... + 2075056.

It is an arithmetic number, because the mean of its divisors is an integer number (24900264).

Almost surely, 2^145251505 is an apocalyptic number.

It is an amenable number.

145251505 is a deficient number, since it is larger than the sum of its proper divisors (53950607).

145251505 is an equidigital number, since it uses as much as digits as its factorization.

145251505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4150055.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 145251505 is about 12052.0332309532. The cubic root of 145251505 is about 525.6623597578.

The spelling of 145251505 in words is "one hundred forty-five million, two hundred fifty-one thousand, five hundred five".