145732277 has 4 divisors (see below), whose sum is σ = 146464800. Its totient is φ = 144999756.

The previous prime is 145732253. The next prime is 145732297. The reversal of 145732277 is 772237541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 772237541 = 829 ⋅931529.

It is a cyclic number.

It is not a de Polignac number, because 145732277 - 2⁸ = 145732021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145732277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145732297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365963 + ... + 366360.

It is an arithmetic number, because the mean of its divisors is an integer number (36616200).

Almost surely, 2^145732277 is an apocalyptic number.

It is an amenable number.

145732277 is a deficient number, since it is larger than the sum of its proper divisors (732523).

145732277 is an equidigital number, since it uses as much as digits as its factorization.

145732277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732522.

The product of its digits is 82320, while the sum is 38.

The square root of 145732277 is about 12071.9624336725. The cubic root of 145732277 is about 526.2416892070.

The spelling of 145732277 in words is "one hundred forty-five million, seven hundred thirty-two thousand, two hundred seventy-seven".