1248967665 has 48 divisors (see below), whose sum is σ = 2383857216. Its totient is φ = 599875200.

The previous prime is 1248967661. The next prime is 1248967669. The reversal of 1248967665 is 5667698421.

It is an interprime number because it is at equal distance from previous prime (1248967661) and next prime (1248967669).

It is not a de Polignac number, because 1248967665 - 2² = 1248967661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1248967661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41175 + ... + 64755.

It is an arithmetic number, because the mean of its divisors is an integer number (49663692).

Almost surely, 2^1248967665 is an apocalyptic number.

1248967665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1248967665 is a deficient number, since it is larger than the sum of its proper divisors (1134889551).

1248967665 is a wasteful number, since it uses less digits than its factorization.

1248967665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23710 (or 23707 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 1248967665 is about 35340.7366222041. The cubic root of 1248967665 is about 1076.9207168976.

The spelling of 1248967665 in words is "one billion, two hundred forty-eight million, nine hundred sixty-seven thousand, six hundred sixty-five".