1121540615 has 12 divisors (see below), whose sum is σ = 1457340264. Its totient is φ = 828213984.

The previous prime is 1121540597. The next prime is 1121540681. The reversal of 1121540615 is 5160451211.

It is not a de Polignac number, because 1121540615 - 2⁸ = 1121540359 is a prime.

It is a Duffinian number.

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, 662789 + ... + 664478.

It is an arithmetic number, because the mean of its divisors is an integer number (121445022).

Almost surely, 2^1121540615 is an apocalyptic number.

1121540615 is a deficient number, since it is larger than the sum of its proper divisors (335799649).

1121540615 is a wasteful number, since it uses less digits than its factorization.

1121540615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327298 (or 1327285 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 1121540615 is about 33489.4104904819. The cubic root of 1121540615 is about 1038.9747709141.

Adding to 1121540615 its reverse (5160451211), we get a palindrome (6281991826).

The spelling of 1121540615 in words is "one billion, one hundred twenty-one million, five hundred forty thousand, six hundred fifteen".