1211252878 has 8 divisors (see below), whose sum is σ = 1982050200. Its totient is φ = 550569480.

The previous prime is 1211252851. The next prime is 1211252881. The reversal of 1211252878 is 8782521121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27528453 + ... + 27528496.

It is an arithmetic number, because the mean of its divisors is an integer number (247756275).

Almost surely, 2^1211252878 is an apocalyptic number.

1211252878 is a deficient number, since it is larger than the sum of its proper divisors (770797322).

1211252878 is a wasteful number, since it uses less digits than its factorization.

1211252878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55056962.

The product of its digits is 17920, while the sum is 37.

The square root of 1211252878 is about 34803.0584575551. The cubic root of 1211252878 is about 1065.9698976677.

Adding to 1211252878 its reverse (8782521121), we get a palindrome (9993773999).

The spelling of 1211252878 in words is "one billion, two hundred eleven million, two hundred fifty-two thousand, eight hundred seventy-eight".