1215930 has 16 divisors (see below), whose sum is σ = 2918304. Its totient is φ = 324240.

The previous prime is 1215923. The next prime is 1216009. The reversal of 1215930 is 395121.

It is a junction number, because it is equal to n+sod(n) for n = 1215897 and 1215906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20236 + ... + 20295.

It is an arithmetic number, because the mean of its divisors is an integer number (182394).

2^1215930 is an apocalyptic number.

1215930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1215930 is an abundant number, since it is smaller than the sum of its proper divisors (1702374).

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

1215930 is a wasteful number, since it uses less digits than its factorization.

1215930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40541.

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

The square root of 1215930 is about 1102.6921601245. The cubic root of 1215930 is about 106.7340177943.

It can be divided in two parts, 1215 and 930, that added together give a triangular number (2145 = T₆₅).

The spelling of 1215930 in words is "one million, two hundred fifteen thousand, nine hundred thirty".