1242605211 has 16 divisors (see below), whose sum is σ = 1687117824. Its totient is φ = 813383424.

The previous prime is 1242605171. The next prime is 1242605213. The reversal of 1242605211 is 1125062421.

It is not a de Polignac number, because 1242605211 - 2¹³ = 1242597019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1242605213) 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 15 ways as a sum of consecutive naturals, for example, 20146 + ... + 53768.

It is an arithmetic number, because the mean of its divisors is an integer number (105444864).

Almost surely, 2^1242605211 is an apocalyptic number.

1242605211 is a deficient number, since it is larger than the sum of its proper divisors (444512613).

1242605211 is a wasteful number, since it uses less digits than its factorization.

1242605211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33850.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1242605211 is about 35250.6058245812. The cubic root of 1242605211 is about 1075.0889303751.

Adding to 1242605211 its reverse (1125062421), we get a palindrome (2367667632).

The spelling of 1242605211 in words is "one billion, two hundred forty-two million, six hundred five thousand, two hundred eleven".