1215258 has 16 divisors (see below), whose sum is σ = 2651616. Its totient is φ = 368240.

The previous prime is 1215239. The next prime is 1215271. The reversal of 1215258 is 8525121.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9141 + ... + 9272.

It is an arithmetic number, because the mean of its divisors is an integer number (165726).

2^1215258 is an apocalyptic number.

1215258 is an abundant number, since it is smaller than the sum of its proper divisors (1436358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215258 is a wasteful number, since it uses less digits than its factorization.

1215258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18429.

The product of its digits is 800, while the sum is 24.

The square root of 1215258 is about 1102.3874092169. The cubic root of 1215258 is about 106.7143515094.

Multiplying 1215258 by its sum of digits (24), we get a palindrome (29166192).

The spelling of 1215258 in words is "one million, two hundred fifteen thousand, two hundred fifty-eight".