1349246721 has 16 divisors (see below), whose sum is σ = 1864972800. Its totient is φ = 866640768.

The previous prime is 1349246713. The next prime is 1349246741. The reversal of 1349246721 is 1276429431.

It is not a de Polignac number, because 1349246721 - 2³ = 1349246713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1349246721.

It is not an unprimeable number, because it can be changed into a prime (1349246711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25485 + ... + 57861.

It is an arithmetic number, because the mean of its divisors is an integer number (116560800).

Almost surely, 2^1349246721 is an apocalyptic number.

It is an amenable number.

1349246721 is a deficient number, since it is larger than the sum of its proper divisors (515726079).

1349246721 is a wasteful number, since it uses less digits than its factorization.

1349246721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32888.

The product of its digits is 72576, while the sum is 39.

The square root of 1349246721 is about 36732.0938825981. The cubic root of 1349246721 is about 1105.0038481197.

The spelling of 1349246721 in words is "one billion, three hundred forty-nine million, two hundred forty-six thousand, seven hundred twenty-one".