1142123215 has 16 divisors (see below), whose sum is σ = 1440334368. Its totient is φ = 868323456.

The previous prime is 1142123161. The next prime is 1142123221. The reversal of 1142123215 is 5123212411.

It is a cyclic number.

It is not a de Polignac number, because 1142123215 - 2²⁷ = 1007905487 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 15 ways as a sum of consecutive naturals, for example, 63832 + ... + 79741.

It is an arithmetic number, because the mean of its divisors is an integer number (90020898).

Almost surely, 2^1142123215 is an apocalyptic number.

1142123215 is a deficient number, since it is larger than the sum of its proper divisors (298211153).

1142123215 is a wasteful number, since it uses less digits than its factorization.

1142123215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143658.

The product of its digits is 480, while the sum is 22.

The square root of 1142123215 is about 33795.3135064612. The cubic root of 1142123215 is about 1045.2920636908.

Adding to 1142123215 its reverse (5123212411), we get a palindrome (6265335626).

The spelling of 1142123215 in words is "one billion, one hundred forty-two million, one hundred twenty-three thousand, two hundred fifteen".