1418721 has 4 divisors (see below), whose sum is σ = 1891632. Its totient is φ = 945812.

The previous prime is 1418693. The next prime is 1418741. The reversal of 1418721 is 1278141.

1418721 = T₃₈₈ + T₃₈₉ + ... + T₄₀₅.

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 1418721 - 2⁵ = 1418689 is a prime.

It is a D-number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1418691 and 1418700.

It is not an unprimeable number, because it can be changed into a prime (1418741) 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, 236451 + ... + 236456.

It is an arithmetic number, because the mean of its divisors is an integer number (472908).

2^1418721 is an apocalyptic number.

It is an amenable number.

1418721 is a deficient number, since it is larger than the sum of its proper divisors (472911).

1418721 is an equidigital number, since it uses as much as digits as its factorization.

1418721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472910.

The product of its digits is 448, while the sum is 24.

The square root of 1418721 is about 1191.1007514060. The cubic root of 1418721 is about 112.3653302139.

The spelling of 1418721 in words is "one million, four hundred eighteen thousand, seven hundred twenty-one".