1386215 has 8 divisors (see below), whose sum is σ = 1695168. Its totient is φ = 1087840.

The previous prime is 1386211. The next prime is 1386223. The reversal of 1386215 is 5126831.

1386215 = 135² + 136² + ... + 187².

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

It is not a de Polignac number, because 1386215 - 2² = 1386211 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 (1386211) 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, 2351 + ... + 2880.

It is an arithmetic number, because the mean of its divisors is an integer number (211896).

2^1386215 is an apocalyptic number.

1386215 is a deficient number, since it is larger than the sum of its proper divisors (308953).

1386215 is an equidigital number, since it uses as much as digits as its factorization.

1386215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289.

The product of its digits is 1440, while the sum is 26.

The square root of 1386215 is about 1177.3763204685. The cubic root of 1386215 is about 111.5005127769.

The spelling of 1386215 in words is "one million, three hundred eighty-six thousand, two hundred fifteen".