145564277 has 4 divisors (see below), whose sum is σ = 146491596. Its totient is φ = 144636960.

The previous prime is 145564261. The next prime is 145564283. The reversal of 145564277 is 772465541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96550276 + 49014001 = 9826^2 + 7001^2 .

It is a cyclic number.

It is not a de Polignac number, because 145564277 - 2⁴ = 145564261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145564247) 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 3 ways as a sum of consecutive naturals, for example, 463424 + ... + 463737.

It is an arithmetic number, because the mean of its divisors is an integer number (36622899).

Almost surely, 2^145564277 is an apocalyptic number.

It is an amenable number.

145564277 is a deficient number, since it is larger than the sum of its proper divisors (927319).

145564277 is an equidigital number, since it uses as much as digits as its factorization.

145564277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 927318.

The product of its digits is 235200, while the sum is 41.

The square root of 145564277 is about 12065.0021549936. The cubic root of 145564277 is about 526.0393945156.

The spelling of 145564277 in words is "one hundred forty-five million, five hundred sixty-four thousand, two hundred seventy-seven".