1121542207 has 16 divisors (see below), whose sum is σ = 1201029120. Its totient is φ = 1043618688.

The previous prime is 1121542193. The next prime is 1121542229. The reversal of 1121542207 is 7022451211.

It is a cyclic number.

It is not a de Polignac number, because 1121542207 - 2²⁷ = 987324479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121542267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 774358 + ... + 775804.

It is an arithmetic number, because the mean of its divisors is an integer number (75064320).

Almost surely, 2^1121542207 is an apocalyptic number.

1121542207 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1121542207 is a deficient number, since it is larger than the sum of its proper divisors (79486913).

1121542207 is a wasteful number, since it uses less digits than its factorization.

1121542207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1121542207 is about 33489.4342591809. The cubic root of 1121542207 is about 1038.9752625138.

Adding to 1121542207 its reverse (7022451211), we get a palindrome (8143993418).

The spelling of 1121542207 in words is "one billion, one hundred twenty-one million, five hundred forty-two thousand, two hundred seven".