1438861 has 4 divisors (see below), whose sum is σ = 1443772. Its totient is φ = 1433952.

The previous prime is 1438849. The next prime is 1438867. The reversal of 1438861 is 1688341.

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 44100 + 1394761 = 210^2 + 1181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1986 + ... + 2611.

It is an arithmetic number, because the mean of its divisors is an integer number (360943).

2^1438861 is an apocalyptic number.

It is an amenable number.

1438861 is a deficient number, since it is larger than the sum of its proper divisors (4911).

1438861 is an equidigital number, since it uses as much as digits as its factorization.

1438861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4910.

The product of its digits is 4608, while the sum is 31.

The square root of 1438861 is about 1199.5253227840. The cubic root of 1438861 is about 112.8945422780.

The spelling of 1438861 in words is "one million, four hundred thirty-eight thousand, eight hundred sixty-one".