145312277 has 8 divisors (see below), whose sum is σ = 167847552. Its totient is φ = 124331200.

The previous prime is 145312253. The next prime is 145312289. The reversal of 145312277 is 772213541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145312277 - 2¹⁴ = 145295893 is a prime.

It is a super-2 number, since 2×145312277² = 42231315693849458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145312207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388349 + ... + 388722.

It is an arithmetic number, because the mean of its divisors is an integer number (20980944).

Almost surely, 2^145312277 is an apocalyptic number.

145312277 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

145312277 is a deficient number, since it is larger than the sum of its proper divisors (22535275).

145312277 is a wasteful number, since it uses less digits than its factorization.

145312277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777099.

The product of its digits is 11760, while the sum is 32.

The square root of 145312277 is about 12054.5542016285. The cubic root of 145312277 is about 525.7356604296.

The spelling of 145312277 in words is "one hundred forty-five million, three hundred twelve thousand, two hundred seventy-seven".