1248388281 has 20 divisors (see below), whose sum is σ = 2131288192. Its totient is φ = 713364408.

The previous prime is 1248388249. The next prime is 1248388307. The reversal of 1248388281 is 1828838421.

It is a happy number.

1248388281 is a `hidden beast` number, since 1 + 248 + 388 + 28 + 1 = 666.

It is not a de Polignac number, because 1248388281 - 2⁵ = 1248388249 is a prime.

It is a super-2 number, since 2×1248388281² = 3116946600276269922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248380281) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1100305 + ... + 1101438.

Almost surely, 2^1248388281 is an apocalyptic number.

It is an amenable number.

1248388281 is a deficient number, since it is larger than the sum of its proper divisors (882899911).

1248388281 is an equidigital number, since it uses as much as digits as its factorization.

1248388281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201762 (or 2201753 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The square root of 1248388281 is about 35332.5385586714. The cubic root of 1248388281 is about 1076.7541667788.

The spelling of 1248388281 in words is "one billion, two hundred forty-eight million, three hundred eighty-eight thousand, two hundred eighty-one".