1121347678 has 16 divisors (see below), whose sum is σ = 1884526704. Its totient is φ = 495927360.

The previous prime is 1121347673. The next prime is 1121347691. The reversal of 1121347678 is 8767431211.

It is a happy number.

It is a super-2 number, since 2×1121347678² = 2514841229911983368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1121347678.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121347673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687975 + ... + 689602.

It is an arithmetic number, because the mean of its divisors is an integer number (117782919).

Almost surely, 2^1121347678 is an apocalyptic number.

1121347678 is a deficient number, since it is larger than the sum of its proper divisors (763179026).

1121347678 is a wasteful number, since it uses less digits than its factorization.

1121347678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377627.

The product of its digits is 56448, while the sum is 40.

The square root of 1121347678 is about 33486.5297993089. The cubic root of 1121347678 is about 1038.9151897248.

Adding to 1121347678 its reverse (8767431211), we get a palindrome (9888778889).

The spelling of 1121347678 in words is "one billion, one hundred twenty-one million, three hundred forty-seven thousand, six hundred seventy-eight".