1242407 has 2 divisors, whose sum is σ = 1242408. Its totient is φ = 1242406.

The previous prime is 1242403. The next prime is 1242413. The reversal of 1242407 is 7042421.

It is a weak prime.

It is an emirp because it is prime and its reverse (7042421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242407 - 2² = 1242403 is a prime.

It is a Chen prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621203 + 621204.

It is an arithmetic number, because the mean of its divisors is an integer number (621204).

2^1242407 is an apocalyptic number.

1242407 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242407 is an equidigital number, since it uses as much as digits as its factorization.

1242407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 1242407 is about 1114.6331234985. The cubic root of 1242407 is about 107.5031763979.

Adding to 1242407 its reverse (7042421), we get a palindrome (8284828).

The spelling of 1242407 in words is "one million, two hundred forty-two thousand, four hundred seven".