1248161871 has 8 divisors (see below), whose sum is σ = 1815508224. Its totient is φ = 756461720.

The previous prime is 1248161857. The next prime is 1248161909. The reversal of 1248161871 is 1781618421.

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

It is a cyclic number.

It is not a de Polignac number, because 1248161871 - 2⁵ = 1248161839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1248161821) 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, 18911511 + ... + 18911576.

It is an arithmetic number, because the mean of its divisors is an integer number (226938528).

Almost surely, 2^1248161871 is an apocalyptic number.

1248161871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1248161871 is a deficient number, since it is larger than the sum of its proper divisors (567346353).

1248161871 is a wasteful number, since it uses less digits than its factorization.

1248161871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37823101.

The product of its digits is 21504, while the sum is 39.

The square root of 1248161871 is about 35329.3344262243. The cubic root of 1248161871 is about 1076.6890688030.

The spelling of 1248161871 in words is "one billion, two hundred forty-eight million, one hundred sixty-one thousand, eight hundred seventy-one".