1249702005 has 16 divisors (see below), whose sum is σ = 2009677824. Its totient is φ = 663122880.

The previous prime is 1249701997. The next prime is 1249702009. The reversal of 1249702005 is 5002079421.

It is not a de Polignac number, because 1249702005 - 2³ = 1249701997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249702009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208501 + ... + 214410.

It is an arithmetic number, because the mean of its divisors is an integer number (125604864).

Almost surely, 2^1249702005 is an apocalyptic number.

1249702005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1249702005 is a deficient number, since it is larger than the sum of its proper divisors (759975819).

1249702005 is a wasteful number, since it uses less digits than its factorization.

1249702005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423116.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1249702005 is about 35351.1245224250. The cubic root of 1249702005 is about 1077.1317367773.

The spelling of 1249702005 in words is "one billion, two hundred forty-nine million, seven hundred two thousand, five".