145428277 has 2 divisors, whose sum is σ = 145428278. Its totient is φ = 145428276.

The previous prime is 145428263. The next prime is 145428281. The reversal of 145428277 is 772824541.

145428277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91126116 + 54302161 = 9546^2 + 7369^2 .

It is a cyclic number.

It is not a de Polignac number, because 145428277 - 2¹⁹ = 144903989 is a prime.

It is a super-2 number, since 2×145428277² = 42298767502377458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145428247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72714138 + 72714139.

It is an arithmetic number, because the mean of its divisors is an integer number (72714139).

Almost surely, 2^145428277 is an apocalyptic number.

It is an amenable number.

145428277 is a deficient number, since it is larger than the sum of its proper divisors (1).

145428277 is an equidigital number, since it uses as much as digits as its factorization.

145428277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125440, while the sum is 40.

The square root of 145428277 is about 12059.3647013431. The cubic root of 145428277 is about 525.8755181146.

The spelling of 145428277 in words is "one hundred forty-five million, four hundred twenty-eight thousand, two hundred seventy-seven".