1040123159 has 4 divisors (see below), whose sum is σ = 1041125280. Its totient is φ = 1039121040.

The previous prime is 1040123083. The next prime is 1040123171. The reversal of 1040123159 is 9513210401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9513210401 = 379 ⋅25100819.

It is a cyclic number.

It is not a de Polignac number, because 1040123159 - 2²⁰ = 1039074583 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 (1040123059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499502 + ... + 501579.

It is an arithmetic number, because the mean of its divisors is an integer number (260281320).

Almost surely, 2^1040123159 is an apocalyptic number.

1040123159 is a deficient number, since it is larger than the sum of its proper divisors (1002121).

1040123159 is a wasteful number, since it uses less digits than its factorization.

1040123159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002120.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1040123159 is about 32250.9404359005. The cubic root of 1040123159 is about 1013.1993957349.

The spelling of 1040123159 in words is "one billion, forty million, one hundred twenty-three thousand, one hundred fifty-nine".