145334257 has 2 divisors, whose sum is σ = 145334258. Its totient is φ = 145334256.

The previous prime is 145334251. The next prime is 145334279. The reversal of 145334257 is 752433541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133610481 + 11723776 = 11559^2 + 3424^2 .

It is a cyclic number.

It is not a de Polignac number, because 145334257 - 2⁷ = 145334129 is a prime.

It is a super-2 number, since 2×145334257² = 42244092515484098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145334251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72667128 + 72667129.

It is an arithmetic number, because the mean of its divisors is an integer number (72667129).

Almost surely, 2^145334257 is an apocalyptic number.

It is an amenable number.

145334257 is a deficient number, since it is larger than the sum of its proper divisors (1).

145334257 is an equidigital number, since it uses as much as digits as its factorization.

145334257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 34.

The square root of 145334257 is about 12055.4658557851. The cubic root of 145334257 is about 525.7621667636.

Adding to 145334257 its reverse (752433541), we get a palindrome (897767798).

The spelling of 145334257 in words is "one hundred forty-five million, three hundred thirty-four thousand, two hundred fifty-seven".