1048123591 has 4 divisors (see below), whose sum is σ = 1048217992. Its totient is φ = 1048029192.

The previous prime is 1048123589. The next prime is 1048123651. The reversal of 1048123591 is 1953218401.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1953218401 = 433 ⋅4510897.

It is a cyclic number.

It is not a de Polignac number, because 1048123591 - 2¹ = 1048123589 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 (1048123691) 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 3 ways as a sum of consecutive naturals, for example, 27921 + ... + 53626.

It is an arithmetic number, because the mean of its divisors is an integer number (262054498).

Almost surely, 2^1048123591 is an apocalyptic number.

1048123591 is a deficient number, since it is larger than the sum of its proper divisors (94401).

1048123591 is an equidigital number, since it uses as much as digits as its factorization.

1048123591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94400.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 1048123591 is about 32374.7369255721. The cubic root of 1048123591 is about 1015.7905433300.

The spelling of 1048123591 in words is "one billion, forty-eight million, one hundred twenty-three thousand, five hundred ninety-one".