1230915 has 32 divisors (see below), whose sum is σ = 2373120. Its totient is φ = 532224.

The previous prime is 1230913. The next prime is 1230941. The reversal of 1230915 is 5190321.

It is not a de Polignac number, because 1230915 - 2¹ = 1230913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1230891 and 1230900.

It is not an unprimeable number, because it can be changed into a prime (1230913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1687 + ... + 2303.

It is an arithmetic number, because the mean of its divisors is an integer number (74160).

2^1230915 is an apocalyptic number.

1230915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1230915 is a deficient number, since it is larger than the sum of its proper divisors (1142205).

1230915 is a wasteful number, since it uses less digits than its factorization.

1230915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651.

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

The square root of 1230915 is about 1109.4660878098. The cubic root of 1230915 is about 107.1706886429.

It can be divided in two parts, 1230 and 915, that added together give a triangular number (2145 = T₆₅).

The spelling of 1230915 in words is "one million, two hundred thirty thousand, nine hundred fifteen".