1125121839 has 8 divisors (see below), whose sum is σ = 1514727552. Its totient is φ = 742798680.

The previous prime is 1125121819. The next prime is 1125121847. The reversal of 1125121839 is 9381215211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1125121839 - 2⁸ = 1125121583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125121819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1820277 + ... + 1820894.

It is an arithmetic number, because the mean of its divisors is an integer number (189340944).

Almost surely, 2^1125121839 is an apocalyptic number.

1125121839 is a deficient number, since it is larger than the sum of its proper divisors (389605713).

1125121839 is a wasteful number, since it uses less digits than its factorization.

1125121839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641277.

The product of its digits is 4320, while the sum is 33.

The square root of 1125121839 is about 33542.8358818988. The cubic root of 1125121839 is about 1040.0794561459.

The spelling of 1125121839 in words is "one billion, one hundred twenty-five million, one hundred twenty-one thousand, eight hundred thirty-nine".