145562771 has 4 divisors (see below), whose sum is σ = 145610544. Its totient is φ = 145515000.

The previous prime is 145562761. The next prime is 145562779. The reversal of 145562771 is 177265541.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145562771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145562779) 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, 18980 + ... + 25521.

It is an arithmetic number, because the mean of its divisors is an integer number (36402636).

Almost surely, 2^145562771 is an apocalyptic number.

145562771 is a deficient number, since it is larger than the sum of its proper divisors (47773).

145562771 is an equidigital number, since it uses as much as digits as its factorization.

145562771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47772.

The product of its digits is 58800, while the sum is 38.

The square root of 145562771 is about 12064.9397429080. The cubic root of 145562771 is about 526.0375803845.

The spelling of 145562771 in words is "one hundred forty-five million, five hundred sixty-two thousand, seven hundred seventy-one".