145230257 has 16 divisors (see below), whose sum is σ = 157151232. Its totient is φ = 133818960.

The previous prime is 145230247. The next prime is 145230259. The reversal of 145230257 is 752032541.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 145230257 - 2⁶ = 145230193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145230259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247118 + ... + 247704.

It is an arithmetic number, because the mean of its divisors is an integer number (9821952).

Almost surely, 2^145230257 is an apocalyptic number.

It is an amenable number.

145230257 is a deficient number, since it is larger than the sum of its proper divisors (11920975).

145230257 is a wasteful number, since it uses less digits than its factorization.

145230257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988.

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

The square root of 145230257 is about 12051.1516877019. The cubic root of 145230257 is about 525.6367264755.

Adding to 145230257 its reverse (752032541), we get a palindrome (897262798).

The spelling of 145230257 in words is "one hundred forty-five million, two hundred thirty thousand, two hundred fifty-seven".