1364721 has 4 divisors (see below), whose sum is σ = 1819632. Its totient is φ = 909812.

The previous prime is 1364719. The next prime is 1364731. The reversal of 1364721 is 1274631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1364721 - 2¹ = 1364719 is a prime.

It is a D-number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1364691 and 1364700.

It is not an unprimeable number, because it can be changed into a prime (1364731) 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, 227451 + ... + 227456.

It is an arithmetic number, because the mean of its divisors is an integer number (454908).

2^1364721 is an apocalyptic number.

It is an amenable number.

1364721 is a deficient number, since it is larger than the sum of its proper divisors (454911).

1364721 is an equidigital number, since it uses as much as digits as its factorization.

1364721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454910.

The product of its digits is 1008, while the sum is 24.

The square root of 1364721 is about 1168.2127374755. The cubic root of 1364721 is about 110.9212167200.

The spelling of 1364721 in words is "one million, three hundred sixty-four thousand, seven hundred twenty-one".