1142272361 has 4 divisors (see below), whose sum is σ = 1142343300. Its totient is φ = 1142201424.

The previous prime is 1142272321. The next prime is 1142272363. The reversal of 1142272361 is 1632722411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1034008336 + 108264025 = 32156^2 + 10405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142272361 - 2¹⁰ = 1142271337 is a prime.

It is a super-2 number, since 2×1142272361² = 2609572293409028642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142272363) 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 3 ways as a sum of consecutive naturals, for example, 1595 + ... + 47823.

It is an arithmetic number, because the mean of its divisors is an integer number (285585825).

Almost surely, 2^1142272361 is an apocalyptic number.

It is an amenable number.

1142272361 is a deficient number, since it is larger than the sum of its proper divisors (70939).

1142272361 is an equidigital number, since it uses as much as digits as its factorization.

1142272361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70938.

The product of its digits is 4032, while the sum is 29.

The square root of 1142272361 is about 33797.5200421569. The cubic root of 1142272361 is about 1045.3375620931.

Adding to 1142272361 its reverse (1632722411), we get a palindrome (2774994772).

The spelling of 1142272361 in words is "one billion, one hundred forty-two million, two hundred seventy-two thousand, three hundred sixty-one".