1129078215 has 12 divisors (see below), whose sum is σ = 1957068984. Its totient is φ = 602175024.

The previous prime is 1129078193. The next prime is 1129078267. The reversal of 1129078215 is 5128709211.

It is a happy number.

It is not a de Polignac number, because 1129078215 - 2⁶ = 1129078151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1129078215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12545269 + ... + 12545358.

It is an arithmetic number, because the mean of its divisors is an integer number (163089082).

Almost surely, 2^1129078215 is an apocalyptic number.

1129078215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1129078215 is a deficient number, since it is larger than the sum of its proper divisors (827990769).

1129078215 is a wasteful number, since it uses less digits than its factorization.

1129078215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25090638 (or 25090635 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 1129078215 is about 33601.7591057373. The cubic root of 1129078215 is about 1041.2971410207.

The spelling of 1129078215 in words is "one billion, one hundred twenty-nine million, seventy-eight thousand, two hundred fifteen".