1242415 has 4 divisors (see below), whose sum is σ = 1490904. Its totient is φ = 993928.

The previous prime is 1242413. The next prime is 1242419. The reversal of 1242415 is 5142421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1242415 - 2¹ = 1242413 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 1242392 and 1242401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242413) 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 3 ways as a sum of consecutive naturals, for example, 124237 + ... + 124246.

It is an arithmetic number, because the mean of its divisors is an integer number (372726).

2^1242415 is an apocalyptic number.

1242415 is a deficient number, since it is larger than the sum of its proper divisors (248489).

1242415 is an equidigital number, since it uses as much as digits as its factorization.

1242415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248488.

The product of its digits is 320, while the sum is 19.

The square root of 1242415 is about 1114.6367121175. The cubic root of 1242415 is about 107.5034071392.

Adding to 1242415 its reverse (5142421), we get a palindrome (6384836).

The spelling of 1242415 in words is "one million, two hundred forty-two thousand, four hundred fifteen".