1245536879 has 16 divisors (see below), whose sum is σ = 1301938176. Its totient is φ = 1190246400.

The previous prime is 1245536869. The next prime is 1245536881. The reversal of 1245536879 is 9786355421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1245536879 - 2²⁴ = 1228759663 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 (1245536869) by changing a digit.

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, 1011194 + ... + 1012424.

It is an arithmetic number, because the mean of its divisors is an integer number (81371136).

Almost surely, 2^1245536879 is an apocalyptic number.

1245536879 is a deficient number, since it is larger than the sum of its proper divisors (56401297).

1245536879 is a wasteful number, since it uses less digits than its factorization.

1245536879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its digits is 1814400, while the sum is 50.

The square root of 1245536879 is about 35292.1645553230. The cubic root of 1245536879 is about 1075.9337490821.

The spelling of 1245536879 in words is "one billion, two hundred forty-five million, five hundred thirty-six thousand, eight hundred seventy-nine".