1142122261 has 8 divisors (see below), whose sum is σ = 1306013184. Its totient is φ = 978414000.

The previous prime is 1142122229. The next prime is 1142122291. The reversal of 1142122261 is 1622212411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1142122261 - 2⁵ = 1142122229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142122291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31990 + ... + 57511.

It is an arithmetic number, because the mean of its divisors is an integer number (163251648).

Almost surely, 2^1142122261 is an apocalyptic number.

It is an amenable number.

1142122261 is a deficient number, since it is larger than the sum of its proper divisors (163890923).

1142122261 is an equidigital number, since it uses as much as digits as its factorization.

1142122261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91331.

The product of its digits is 384, while the sum is 22.

The square root of 1142122261 is about 33795.2993920752. The cubic root of 1142122261 is about 1045.2917726513.

Adding to 1142122261 its reverse (1622212411), we get a palindrome (2764334672).

The spelling of 1142122261 in words is "one billion, one hundred forty-two million, one hundred twenty-two thousand, two hundred sixty-one".