145561205 has 4 divisors (see below), whose sum is σ = 174673452. Its totient is φ = 116448960.

The previous prime is 145561139. The next prime is 145561231. The reversal of 145561205 is 502165541.

It is a happy number.

145561205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502165541 = 227 ⋅2212183.

It can be written as a sum of positive squares in 2 ways, for example, as 80694289 + 64866916 = 8983^2 + 8054^2 .

It is not a de Polignac number, because 145561205 - 2²⁰ = 144512629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14556116 + ... + 14556125.

It is an arithmetic number, because the mean of its divisors is an integer number (43668363).

Almost surely, 2^145561205 is an apocalyptic number.

It is an amenable number.

145561205 is a deficient number, since it is larger than the sum of its proper divisors (29112247).

145561205 is an equidigital number, since it uses as much as digits as its factorization.

145561205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29112246.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 145561205 is about 12064.8748439426. The cubic root of 145561205 is about 526.0356939639.

The spelling of 145561205 in words is "one hundred forty-five million, five hundred sixty-one thousand, two hundred five".