1248731906 has 16 divisors (see below), whose sum is σ = 1987607160. Its totient is φ = 586356480.

The previous prime is 1248731881. The next prime is 1248731921. The reversal of 1248731906 is 6091378421.

It can be written as a sum of positive squares in 4 ways, for example, as 1121245225 + 127486681 = 33485^2 + 11291^2 .

It is a nialpdrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24161 + ... + 55508.

Almost surely, 2^1248731906 is an apocalyptic number.

1248731906 is a deficient number, since it is larger than the sum of its proper divisors (738875254).

1248731906 is a wasteful number, since it uses less digits than its factorization.

1248731906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80149.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 1248731906 is about 35337.4009513999. The cubic root of 1248731906 is about 1076.8529516716.

The spelling of 1248731906 in words is "one billion, two hundred forty-eight million, seven hundred thirty-one thousand, nine hundred six".