1539125942099 has 4 divisors (see below), whose sum is σ = 1539128426136. Its totient is φ = 1539123458064.

The previous prime is 1539125941981. The next prime is 1539125942111. The reversal of 1539125942099 is 9902495219351.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1539125942099 - 2²⁴ = 1539109164883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1539125948099) 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, 532487 + ... + 1833519.

It is an arithmetic number, because the mean of its divisors is an integer number (384782106534).

Almost surely, 2^{1539125942099} is an apocalyptic number.

1539125942099 is a deficient number, since it is larger than the sum of its proper divisors (2484037).

1539125942099 is a wasteful number, since it uses less digits than its factorization.

1539125942099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484036.

The product of its (nonzero) digits is 7873200, while the sum is 59.

The spelling of 1539125942099 in words is "one trillion, five hundred thirty-nine billion, one hundred twenty-five million, nine hundred forty-two thousand, ninety-nine".