1240545135145 has 4 divisors (see below), whose sum is σ = 1488654162180. Its totient is φ = 992436108112.

The previous prime is 1240545135143. The next prime is 1240545135163. The reversal of 1240545135145 is 5415315450421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 971507893801 + 269037241344 = 985651^2 + 518688^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240545135145 - 2¹ = 1240545135143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240545135098 and 1240545135107.

It is not an unprimeable number, because it can be changed into a prime (1240545135143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124054513510 + ... + 124054513519.

It is an arithmetic number, because the mean of its divisors is an integer number (372163540545).

Almost surely, 2^{1240545135145} is an apocalyptic number.

It is an amenable number.

1240545135145 is a deficient number, since it is larger than the sum of its proper divisors (248109027035).

1240545135145 is an equidigital number, since it uses as much as digits as its factorization.

1240545135145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248109027034.

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 1240545135145 in words is "one trillion, two hundred forty billion, five hundred forty-five million, one hundred thirty-five thousand, one hundred forty-five".