1242207 has 24 divisors (see below), whose sum is σ = 1988064. Its totient is φ = 743424.

The previous prime is 1242193. The next prime is 1242217. The reversal of 1242207 is 7022421.

It is not a de Polignac number, because 1242207 - 2⁴ = 1242191 is a prime.

1242207 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1242207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242217) 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 23 ways as a sum of consecutive naturals, for example, 3343 + ... + 3695.

It is an arithmetic number, because the mean of its divisors is an integer number (82836).

2^1242207 is an apocalyptic number.

1242207 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1242207 is a deficient number, since it is larger than the sum of its proper divisors (745857).

1242207 is a wasteful number, since it uses less digits than its factorization.

1242207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 1242207 is about 1114.5434042692. The cubic root of 1242207 is about 107.4974075452.

Adding to 1242207 its reverse (7022421), we get a palindrome (8264628).

The spelling of 1242207 in words is "one million, two hundred forty-two thousand, two hundred seven".