1252802915138 has 16 divisors (see below), whose sum is σ = 1944795312000. Its totient is φ = 604555384272.

The previous prime is 1252802915107. The next prime is 1252802915239. The reversal of 1252802915138 is 8315192082521.

It is a junction number, because it is equal to n+sod(n) for n = 1252802915092 and 1252802915101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4249418 + ... + 4534661.

It is an arithmetic number, because the mean of its divisors is an integer number (121549707000).

Almost surely, 2^{1252802915138} is an apocalyptic number.

1252802915138 is a deficient number, since it is larger than the sum of its proper divisors (691992396862).

1252802915138 is a wasteful number, since it uses less digits than its factorization.

1252802915138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8786569.

The product of its (nonzero) digits is 345600, while the sum is 47.

Adding to 1252802915138 its reverse (8315192082521), we get a palindrome (9567994997659).

The spelling of 1252802915138 in words is "one trillion, two hundred fifty-two billion, eight hundred two million, nine hundred fifteen thousand, one hundred thirty-eight".