1248917681 has 8 divisors (see below), whose sum is σ = 1368408000. Its totient is φ = 1130419440.

The previous prime is 1248917639. The next prime is 1248917693. The reversal of 1248917681 is 1867198421.

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 1248917681 - 2⁶ = 1248917617 is a prime.

It is a super-2 number, since 2×1248917681² = 3119590747828835522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248917611) 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, 245381 + ... + 250418.

It is an arithmetic number, because the mean of its divisors is an integer number (171051000).

Almost surely, 2^1248917681 is an apocalyptic number.

1248917681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1248917681 is a deficient number, since it is larger than the sum of its proper divisors (119490319).

1248917681 is a wasteful number, since it uses less digits than its factorization.

1248917681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496039.

The product of its digits is 193536, while the sum is 47.

The square root of 1248917681 is about 35340.0294425457. The cubic root of 1248917681 is about 1076.9063504934.

The spelling of 1248917681 in words is "one billion, two hundred forty-eight million, nine hundred seventeen thousand, six hundred eighty-one".