1211252042 has 32 divisors (see below), whose sum is σ = 2439448704. Its totient is φ = 435614400.

The previous prime is 1211252039. The next prime is 1211252083. The reversal of 1211252042 is 2402521121.

It is an unprimeable number.

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, 300509 + ... + 304512.

It is an arithmetic number, because the mean of its divisors is an integer number (76232772).

Almost surely, 2^1211252042 is an apocalyptic number.

1211252042 is an abundant number, since it is smaller than the sum of its proper divisors (1228196662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211252042 is a wasteful number, since it uses less digits than its factorization.

1211252042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605054.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1211252042 is about 34803.0464471144. The cubic root of 1211252042 is about 1065.9696524255.

Adding to 1211252042 its reverse (2402521121), we get a palindrome (3613773163).

The spelling of 1211252042 in words is "one billion, two hundred eleven million, two hundred fifty-two thousand, forty-two".