145240457 has 2 divisors, whose sum is σ = 145240458. Its totient is φ = 145240456.

The previous prime is 145240441. The next prime is 145240471. The reversal of 145240457 is 754042541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129527161 + 15713296 = 11381^2 + 3964^2 .

It is a cyclic number.

It is not a de Polignac number, because 145240457 - 2⁴ = 145240441 is a prime.

It is not a weakly prime, because it can be changed into another prime (145240357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72620228 + 72620229.

It is an arithmetic number, because the mean of its divisors is an integer number (72620229).

Almost surely, 2^145240457 is an apocalyptic number.

It is an amenable number.

145240457 is a deficient number, since it is larger than the sum of its proper divisors (1).

145240457 is an equidigital number, since it uses as much as digits as its factorization.

145240457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 145240457 is about 12051.5748763388. The cubic root of 145240457 is about 525.6490319211.

Adding to 145240457 its reverse (754042541), we get a palindrome (899282998).

The spelling of 145240457 in words is "one hundred forty-five million, two hundred forty thousand, four hundred fifty-seven".