1121871278 has 16 divisors (see below), whose sum is σ = 1837251504. Its totient is φ = 509535360.

The previous prime is 1121871271. The next prime is 1121871281. The reversal of 1121871278 is 8721781211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121871271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8876 + ... + 48192.

It is an arithmetic number, because the mean of its divisors is an integer number (114828219).

Almost surely, 2^1121871278 is an apocalyptic number.

1121871278 is a deficient number, since it is larger than the sum of its proper divisors (715380226).

1121871278 is a wasteful number, since it uses less digits than its factorization.

1121871278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40627.

The product of its digits is 12544, while the sum is 38.

The square root of 1121871278 is about 33494.3469558670. The cubic root of 1121871278 is about 1039.0768676053.

The spelling of 1121871278 in words is "one billion, one hundred twenty-one million, eight hundred seventy-one thousand, two hundred seventy-eight".