1315905 has 16 divisors (see below), whose sum is σ = 2163264. Its totient is φ = 682560.

The previous prime is 1315901. The next prime is 1315907. The reversal of 1315905 is 5095131.

It is not a de Polignac number, because 1315905 - 2² = 1315901 is a prime.

It is an Ulam number.

1315905 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1315901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631 + ... + 1740.

It is an arithmetic number, because the mean of its divisors is an integer number (135204).

2^1315905 is an apocalyptic number.

1315905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1315905 is a deficient number, since it is larger than the sum of its proper divisors (847359).

1315905 is a wasteful number, since it uses less digits than its factorization.

1315905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416.

The product of its (nonzero) digits is 675, while the sum is 24.

The square root of 1315905 is about 1147.1290250011. The cubic root of 1315905 is about 109.5825777713.

The spelling of 1315905 in words is "one million, three hundred fifteen thousand, nine hundred five".