145131345 has 20 divisors (see below), whose sum is σ = 260162100. Its totient is φ = 77403168.

The previous prime is 145131319. The next prime is 145131377. The reversal of 145131345 is 543131541.

It is a happy number.

145131345 is a `hidden beast` number, since 14 + 513 + 134 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30041361 + 115089984 = 5481^2 + 10728^2 .

It is not a de Polignac number, because 145131345 - 2⁹ = 145130833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 178770 + ... + 179579.

It is an arithmetic number, because the mean of its divisors is an integer number (13008105).

Almost surely, 2^145131345 is an apocalyptic number.

145131345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

145131345 is a deficient number, since it is larger than the sum of its proper divisors (115030755).

145131345 is an equidigital number, since it uses as much as digits as its factorization.

145131345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358366 (or 358357 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 145131345 is about 12047.0471485755. The cubic root of 145131345 is about 525.5173675375.

Adding to 145131345 its reverse (543131541), we get a palindrome (688262886).

The spelling of 145131345 in words is "one hundred forty-five million, one hundred thirty-one thousand, three hundred forty-five".