1242671648 has 12 divisors (see below), whose sum is σ = 2446509870. Its totient is φ = 621335808.

The previous prime is 1242671641. The next prime is 1242671671. The reversal of 1242671648 is 8461762421.

It can be written as a sum of positive squares in only one way, i.e., 1141628944 + 101042704 = 33788^2 + 10052^2 .

It is not an unprimeable number, because it can be changed into a prime (1242671641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19416713 + ... + 19416776.

Almost surely, 2^1242671648 is an apocalyptic number.

It is an amenable number.

1242671648 is a deficient number, since it is larger than the sum of its proper divisors (1203838222).

1242671648 is an equidigital number, since it uses as much as digits as its factorization.

1242671648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38833499 (or 38833491 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 1242671648 is about 35251.5481645842. The cubic root of 1242671648 is about 1075.1080902310.

The spelling of 1242671648 in words is "one billion, two hundred forty-two million, six hundred seventy-one thousand, six hundred forty-eight".