1260721 has 12 divisors (see below), whose sum is σ = 1600560. Its totient is φ = 981960.

The previous prime is 1260719. The next prime is 1260731. The reversal of 1260721 is 1270621.

It is not a de Polignac number, because 1260721 - 2¹ = 1260719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1260731) 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 11 ways as a sum of consecutive naturals, for example, 631 + ... + 1708.

It is an arithmetic number, because the mean of its divisors is an integer number (133380).

2^1260721 is an apocalyptic number.

1260721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1260721 is a deficient number, since it is larger than the sum of its proper divisors (339839).

1260721 is a wasteful number, since it uses less digits than its factorization.

1260721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364 (or 2357 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1260721 is about 1122.8183290275. The cubic root of 1260721 is about 108.0288274670.

The spelling of 1260721 in words is "one million, two hundred sixty thousand, seven hundred twenty-one".