145220357 has 2 divisors, whose sum is σ = 145220358. Its totient is φ = 145220356.

The previous prime is 145220353. The next prime is 145220381. The reversal of 145220357 is 753022541.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110481121 + 34739236 = 10511^2 + 5894^2 .

It is an emirp because it is prime and its reverse (753022541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145220357 - 2² = 145220353 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145220353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72610178 + 72610179.

It is an arithmetic number, because the mean of its divisors is an integer number (72610179).

Almost surely, 2^145220357 is an apocalyptic number.

It is an amenable number.

145220357 is a deficient number, since it is larger than the sum of its proper divisors (1).

145220357 is an equidigital number, since it uses as much as digits as its factorization.

145220357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 145220357 is about 12050.7409315776. The cubic root of 145220357 is about 525.6247824037.

Adding to 145220357 its reverse (753022541), we get a palindrome (898242898).

The spelling of 145220357 in words is "one hundred forty-five million, two hundred twenty thousand, three hundred fifty-seven".