145220057 has 2 divisors, whose sum is σ = 145220058. Its totient is φ = 145220056.

The previous prime is 145220041. The next prime is 145220087. The reversal of 145220057 is 750022541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131239936 + 13980121 = 11456^2 + 3739^2 .

It is a cyclic number.

It is not a de Polignac number, because 145220057 - 2⁴ = 145220041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145220087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72610028 + 72610029.

It is an arithmetic number, because the mean of its divisors is an integer number (72610029).

Almost surely, 2^145220057 is an apocalyptic number.

It is an amenable number.

145220057 is a deficient number, since it is larger than the sum of its proper divisors (1).

145220057 is an equidigital number, since it uses as much as digits as its factorization.

145220057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 145220057 is about 12050.7284842038. The cubic root of 145220057 is about 525.6244204537.

Adding to 145220057 its reverse (750022541), we get a palindrome (895242598).

The spelling of 145220057 in words is "one hundred forty-five million, two hundred twenty thousand, fifty-seven".