145495261 has 4 divisors (see below), whose sum is σ = 146185024. Its totient is φ = 144805500.

The previous prime is 145495241. The next prime is 145495277. The reversal of 145495261 is 162594541.

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, and also an emirpimes, since its reverse is a distinct semiprime: 162594541 = 197 ⋅825353.

It is a cyclic number.

It is not a de Polignac number, because 145495261 - 2²³ = 137106653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145495261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145495241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344565 + ... + 344986.

It is an arithmetic number, because the mean of its divisors is an integer number (36546256).

Almost surely, 2^145495261 is an apocalyptic number.

It is an amenable number.

145495261 is a deficient number, since it is larger than the sum of its proper divisors (689763).

145495261 is an equidigital number, since it uses as much as digits as its factorization.

145495261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689762.

The product of its digits is 43200, while the sum is 37.

The square root of 145495261 is about 12062.1416423453. The cubic root of 145495261 is about 525.9562448242.

The spelling of 145495261 in words is "one hundred forty-five million, four hundred ninety-five thousand, two hundred sixty-one".