1247881244 has 12 divisors (see below), whose sum is σ = 2184088368. Its totient is φ = 623856000.

The previous prime is 1247881213. The next prime is 1247881249. The reversal of 1247881244 is 4421887421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247881249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21644 + ... + 54444.

It is an arithmetic number, because the mean of its divisors is an integer number (182007364).

Almost surely, 2^1247881244 is an apocalyptic number.

It is an amenable number.

1247881244 is a deficient number, since it is larger than the sum of its proper divisors (936207124).

1247881244 is a wasteful number, since it uses less digits than its factorization.

1247881244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42316 (or 42314 counting only the distinct ones).

The product of its digits is 114688, while the sum is 41.

The square root of 1247881244 is about 35325.3626166810. The cubic root of 1247881244 is about 1076.6083712916.

The spelling of 1247881244 in words is "one billion, two hundred forty-seven million, eight hundred eighty-one thousand, two hundred forty-four".