145120457 has 2 divisors, whose sum is σ = 145120458. Its totient is φ = 145120456.

The previous prime is 145120453. The next prime is 145120489. The reversal of 145120457 is 754021541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112126921 + 32993536 = 10589^2 + 5744^2 .

It is a cyclic number.

It is not a de Polignac number, because 145120457 - 2² = 145120453 is a prime.

It is not a weakly prime, because it can be changed into another prime (145120453) 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, 72560228 + 72560229.

It is an arithmetic number, because the mean of its divisors is an integer number (72560229).

Almost surely, 2^145120457 is an apocalyptic number.

It is an amenable number.

145120457 is a deficient number, since it is larger than the sum of its proper divisors (1).

145120457 is an equidigital number, since it uses as much as digits as its factorization.

145120457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 145120457 is about 12046.5952451305. The cubic root of 145120457 is about 525.5042254737.

Adding to 145120457 its reverse (754021541), we get a palindrome (899141998).

The spelling of 145120457 in words is "one hundred forty-five million, one hundred twenty thousand, four hundred fifty-seven".