145887277 has 4 divisors (see below), whose sum is σ = 145999036. Its totient is φ = 145775520.

The previous prime is 145887253. The next prime is 145887283. The reversal of 145887277 is 772788541.

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 123787876 + 22099401 = 11126^2 + 4701^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145887277 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 145887277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145887227) 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, 53898 + ... + 56539.

It is an arithmetic number, because the mean of its divisors is an integer number (36499759).

Almost surely, 2^145887277 is an apocalyptic number.

It is an amenable number.

145887277 is a deficient number, since it is larger than the sum of its proper divisors (111759).

145887277 is a wasteful number, since it uses less digits than its factorization.

145887277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111758.

The product of its digits is 878080, while the sum is 49.

The square root of 145887277 is about 12078.3805619793. The cubic root of 145887277 is about 526.4281922987.

The spelling of 145887277 in words is "one hundred forty-five million, eight hundred eighty-seven thousand, two hundred seventy-seven".