1205913 has 8 divisors (see below), whose sum is σ = 1677888. Its totient is φ = 768944.

The previous prime is 1205903. The next prime is 1205921. The reversal of 1205913 is 3195021.

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

It is a cyclic number.

It is not a de Polignac number, because 1205913 - 2¹⁸ = 943769 is a prime.

It is a plaindrome in base 14 and base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1205913.

It is not an unprimeable number, because it can be changed into a prime (1205903) 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, 8670 + ... + 8807.

It is an arithmetic number, because the mean of its divisors is an integer number (209736).

2^1205913 is an apocalyptic number.

It is an amenable number.

1205913 is a deficient number, since it is larger than the sum of its proper divisors (471975).

1205913 is a wasteful number, since it uses less digits than its factorization.

1205913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17503.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 1205913 is about 1098.1407013675. The cubic root of 1205913 is about 106.4401126858.

The spelling of 1205913 in words is "one million, two hundred five thousand, nine hundred thirteen".