145132257 has 4 divisors (see below), whose sum is σ = 193509680. Its totient is φ = 96754836.

The previous prime is 145132219. The next prime is 145132259. The reversal of 145132257 is 752231541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 145132257 - 2⁷ = 145132129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145132259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24188707 + ... + 24188712.

It is an arithmetic number, because the mean of its divisors is an integer number (48377420).

Almost surely, 2^145132257 is an apocalyptic number.

It is an amenable number.

145132257 is a deficient number, since it is larger than the sum of its proper divisors (48377423).

145132257 is an equidigital number, since it uses as much as digits as its factorization.

145132257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48377422.

The product of its digits is 8400, while the sum is 30.

The square root of 145132257 is about 12047.0850001152. The cubic root of 145132257 is about 525.5184683124.

Adding to 145132257 its reverse (752231541), we get a palindrome (897363798).

The spelling of 145132257 in words is "one hundred forty-five million, one hundred thirty-two thousand, two hundred fifty-seven".