1215423 has 12 divisors (see below), whose sum is σ = 1915368. Its totient is φ = 736560.

The previous prime is 1215421. The next prime is 1215433. The reversal of 1215423 is 3245121.

Added to its reverse (3245121) it gives a square (4460544 = 2112²).

1215423 is a `hidden beast` number, since 121 + 542 + 3 = 666.

It is not a de Polignac number, because 1215423 - 2¹ = 1215421 is a prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1215396 and 1215405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6040 + ... + 6237.

It is an arithmetic number, because the mean of its divisors is an integer number (159614).

2^1215423 is an apocalyptic number.

1215423 is a deficient number, since it is larger than the sum of its proper divisors (699945).

1215423 is a wasteful number, since it uses less digits than its factorization.

1215423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12294 (or 12291 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 1215423 is about 1102.4622442515. The cubic root of 1215423 is about 106.7191809561.

Adding to 1215423 its reverse (3245121), we get a square (4460544 = 2112²).

The spelling of 1215423 in words is "one million, two hundred fifteen thousand, four hundred twenty-three".