1308215 has 4 divisors (see below), whose sum is σ = 1569864. Its totient is φ = 1046568.

The previous prime is 1308193. The next prime is 1308221. The reversal of 1308215 is 5128031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1308215 - 2¹⁴ = 1291831 is a prime.

It is a super-2 number, since 2×1308215² = 3422852972450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130817 + ... + 130826.

It is an arithmetic number, because the mean of its divisors is an integer number (392466).

2^1308215 is an apocalyptic number.

1308215 is a deficient number, since it is larger than the sum of its proper divisors (261649).

1308215 is an equidigital number, since it uses as much as digits as its factorization.

1308215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261648.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1308215 is about 1143.7722675428. The cubic root of 1308215 is about 109.3686978682.

The spelling of 1308215 in words is "one million, three hundred eight thousand, two hundred fifteen".