145512779 has 4 divisors (see below), whose sum is σ = 145552440. Its totient is φ = 145473120.

The previous prime is 145512767. The next prime is 145512797. The reversal of 145512779 is 977215541.

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-145512779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145512739) 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, 13694 + ... + 21875.

It is an arithmetic number, because the mean of its divisors is an integer number (36388110).

Almost surely, 2^145512779 is an apocalyptic number.

145512779 is a deficient number, since it is larger than the sum of its proper divisors (39661).

145512779 is an equidigital number, since it uses as much as digits as its factorization.

145512779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39660.

The product of its digits is 88200, while the sum is 41.

The square root of 145512779 is about 12062.8677767768. The cubic root of 145512779 is about 525.9773528009.

The spelling of 145512779 in words is "one hundred forty-five million, five hundred twelve thousand, seven hundred seventy-nine".