145902505 has 16 divisors (see below), whose sum is σ = 200363904. Its totient is φ = 99912960.

The previous prime is 145902473. The next prime is 145902521. The reversal of 145902505 is 505209541.

It is not a de Polignac number, because 145902505 - 2⁵ = 145902473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 28545 + ... + 33265.

It is an arithmetic number, because the mean of its divisors is an integer number (12522744).

Almost surely, 2^145902505 is an apocalyptic number.

It is an amenable number.

145902505 is a deficient number, since it is larger than the sum of its proper divisors (54461399).

145902505 is an equidigital number, since it uses as much as digits as its factorization.

145902505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5616.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 145902505 is about 12079.0109280520. The cubic root of 145902505 is about 526.4465081971.

The spelling of 145902505 in words is "one hundred forty-five million, nine hundred two thousand, five hundred five".