1545534145 has 4 divisors (see below), whose sum is σ = 1854640980. Its totient is φ = 1236427312.

The previous prime is 1545534139. The next prime is 1545534163. The reversal of 1545534145 is 5414355451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5414355451 = 487 ⋅11117773.

It can be written as a sum of positive squares in 2 ways, for example, as 240374016 + 1305160129 = 15504^2 + 36127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1545534145 - 2¹⁹ = 1545009857 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154553410 + ... + 154553419.

It is an arithmetic number, because the mean of its divisors is an integer number (463660245).

Almost surely, 2^1545534145 is an apocalyptic number.

It is an amenable number.

1545534145 is a deficient number, since it is larger than the sum of its proper divisors (309106835).

1545534145 is an equidigital number, since it uses as much as digits as its factorization.

1545534145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309106834.

The product of its digits is 120000, while the sum is 37.

The square root of 1545534145 is about 39313.2820430958. The cubic root of 1545534145 is about 1156.1819936822.

Adding to 1545534145 its reverse (5414355451), we get a palindrome (6959889596).

The spelling of 1545534145 in words is "one billion, five hundred forty-five million, five hundred thirty-four thousand, one hundred forty-five".