1260370721 has 8 divisors (see below), whose sum is σ = 1345755840. Its totient is φ = 1177534512.

The previous prime is 1260370703. The next prime is 1260370747. The reversal of 1260370721 is 1270730621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1260370721 - 2²⁶ = 1193261857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260370121) 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 7 ways as a sum of consecutive naturals, for example, 636206 + ... + 638183.

It is an arithmetic number, because the mean of its divisors is an integer number (168219480).

Almost surely, 2^1260370721 is an apocalyptic number.

It is an amenable number.

1260370721 is a deficient number, since it is larger than the sum of its proper divisors (85385119).

1260370721 is a wasteful number, since it uses less digits than its factorization.

1260370721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274455.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 1260370721 is about 35501.7002550582. The cubic root of 1260370721 is about 1080.1882162252.

The spelling of 1260370721 in words is "one billion, two hundred sixty million, three hundred seventy thousand, seven hundred twenty-one".