1240134545 has 16 divisors (see below), whose sum is σ = 1632878352. Its totient is φ = 898510080.

The previous prime is 1240134521. The next prime is 1240134551. The reversal of 1240134545 is 5454310421.

It can be written as a sum of positive squares in 8 ways, for example, as 4190209 + 1235944336 = 2047^2 + 35156^2 .

It is not a de Polignac number, because 1240134545 - 2¹⁸ = 1239872401 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 176546 + ... + 183435.

It is an arithmetic number, because the mean of its divisors is an integer number (102054897).

Almost surely, 2^1240134545 is an apocalyptic number.

It is an amenable number.

1240134545 is a deficient number, since it is larger than the sum of its proper divisors (392743807).

1240134545 is a wasteful number, since it uses less digits than its factorization.

1240134545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360052.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1240134545 is about 35215.5440821237. The cubic root of 1240134545 is about 1074.3759262184.

Adding to 1240134545 its reverse (5454310421), we get a palindrome (6694444966).

The spelling of 1240134545 in words is "one billion, two hundred forty million, one hundred thirty-four thousand, five hundred forty-five".