1244721 has 8 divisors (see below), whose sum is σ = 1698400. Its totient is φ = 810432.

The previous prime is 1244713. The next prime is 1244729. The reversal of 1244721 is 1274421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1244713) and next prime (1244729).

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

It is not a de Polignac number, because 1244721 - 2³ = 1244713 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1244729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4696 + ... + 4953.

It is an arithmetic number, because the mean of its divisors is an integer number (212300).

2^1244721 is an apocalyptic number.

It is an amenable number.

1244721 is a deficient number, since it is larger than the sum of its proper divisors (453679).

1244721 is an equidigital number, since it uses as much as digits as its factorization.

1244721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9695.

The product of its digits is 448, while the sum is 21.

The square root of 1244721 is about 1115.6706503265. The cubic root of 1244721 is about 107.5698770494.

The spelling of 1244721 in words is "one million, two hundred forty-four thousand, seven hundred twenty-one".