1438215 has 8 divisors (see below), whose sum is σ = 2301168. Its totient is φ = 767040.

The previous prime is 1438211. The next prime is 1438223. The reversal of 1438215 is 5128341.

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

It is not a de Polignac number, because 1438215 - 2² = 1438211 is a prime.

1438215 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438211) 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 7 ways as a sum of consecutive naturals, for example, 47926 + ... + 47955.

It is an arithmetic number, because the mean of its divisors is an integer number (287646).

2^1438215 is an apocalyptic number.

1438215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1438215 is a deficient number, since it is larger than the sum of its proper divisors (862953).

1438215 is an equidigital number, since it uses as much as digits as its factorization.

1438215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95889.

The product of its digits is 960, while the sum is 24.

The square root of 1438215 is about 1199.2560193720. The cubic root of 1438215 is about 112.8776444698.

It can be divided in two parts, 1438 and 215, that added together give a triangular number (1653 = T₅₇).

The spelling of 1438215 in words is "one million, four hundred thirty-eight thousand, two hundred fifteen".