1354721 has 4 divisors (see below), whose sum is σ = 1359792. Its totient is φ = 1349652.

The previous prime is 1354711. The next prime is 1354741. The reversal of 1354721 is 1274531.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1274531 = 347 ⋅3673.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1354721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1354711) 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, 2111 + ... + 2676.

It is an arithmetic number, because the mean of its divisors is an integer number (339948).

2^1354721 is an apocalyptic number.

It is an amenable number.

1354721 is a deficient number, since it is larger than the sum of its proper divisors (5071).

1354721 is an equidigital number, since it uses as much as digits as its factorization.

1354721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070.

The product of its digits is 840, while the sum is 23.

The square root of 1354721 is about 1163.9248257512. The cubic root of 1354721 is about 110.6496270196.

The spelling of 1354721 in words is "one million, three hundred fifty-four thousand, seven hundred twenty-one".