145898257 has 2 divisors, whose sum is σ = 145898258. Its totient is φ = 145898256.

The previous prime is 145898231. The next prime is 145898261. The reversal of 145898257 is 752898541.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83740801 + 62157456 = 9151^2 + 7884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145898257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145898257.

It is not a weakly prime, because it can be changed into another prime (145898297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72949128 + 72949129.

It is an arithmetic number, because the mean of its divisors is an integer number (72949129).

Almost surely, 2^145898257 is an apocalyptic number.

It is an amenable number.

145898257 is a deficient number, since it is larger than the sum of its proper divisors (1).

145898257 is an equidigital number, since it uses as much as digits as its factorization.

145898257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 49.

The square root of 145898257 is about 12078.8350845601. The cubic root of 145898257 is about 526.4413989257.

The spelling of 145898257 in words is "one hundred forty-five million, eight hundred ninety-eight thousand, two hundred fifty-seven".