1254545165 has 8 divisors (see below), whose sum is σ = 1505695128. Its totient is φ = 1003475520.

The previous prime is 1254545161. The next prime is 1254545213. The reversal of 1254545165 is 5615454521.

It can be written as a sum of positive squares in 4 ways, for example, as 196084009 + 1058461156 = 14003^2 + 32534^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1254545165 - 2² = 1254545161 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1254545161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22499 + ... + 54911.

It is an arithmetic number, because the mean of its divisors is an integer number (188211891).

Almost surely, 2^1254545165 is an apocalyptic number.

It is an amenable number.

1254545165 is a deficient number, since it is larger than the sum of its proper divisors (251149963).

1254545165 is an equidigital number, since it uses as much as digits as its factorization.

1254545165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40159.

The product of its digits is 120000, while the sum is 38.

The square root of 1254545165 is about 35419.5590740483. The cubic root of 1254545165 is about 1078.5214005378.

Adding to 1254545165 its reverse (5615454521), we get a palindrome (6869999686).

It can be divided in two parts, 125454516 and 5, that added together give a palindrome (125454521).

The spelling of 1254545165 in words is "one billion, two hundred fifty-four million, five hundred forty-five thousand, one hundred sixty-five".