1494721 has 4 divisors (see below), whose sum is σ = 1498500. Its totient is φ = 1490944.

The previous prime is 1494719. The next prime is 1494739. The reversal of 1494721 is 1274941.

1494721 = 864² + 865².

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 748225 + 746496 = 865^2 + 864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1494721 - 2¹ = 1494719 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1494721.

It is not an unprimeable number, because it can be changed into a prime (1494781) 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, 1216 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (374625).

2^1494721 is an apocalyptic number.

1494721 is the 865-th centered square number.

It is an amenable number.

1494721 is a deficient number, since it is larger than the sum of its proper divisors (3779).

1494721 is an equidigital number, since it uses as much as digits as its factorization.

1494721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3778.

The product of its digits is 2016, while the sum is 28.

The square root of 1494721 is about 1222.5878291558. The cubic root of 1494721 is about 114.3369787125.

The spelling of 1494721 in words is "one million, four hundred ninety-four thousand, seven hundred twenty-one".