1142552261 has 4 divisors (see below), whose sum is σ = 1142620524. Its totient is φ = 1142484000.

The previous prime is 1142552239. The next prime is 1142552293. The reversal of 1142552261 is 1622552411.

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 561453025 + 581099236 = 23695^2 + 24106^2 .

It is a cyclic number.

It is not a de Polignac number, because 1142552261 - 2⁶ = 1142552197 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 (1142552231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9971 + ... + 48831.

It is an arithmetic number, because the mean of its divisors is an integer number (285655131).

Almost surely, 2^1142552261 is an apocalyptic number.

It is an amenable number.

1142552261 is a deficient number, since it is larger than the sum of its proper divisors (68263).

1142552261 is an equidigital number, since it uses as much as digits as its factorization.

1142552261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68262.

The product of its digits is 4800, while the sum is 29.

The square root of 1142552261 is about 33801.6606248865. The cubic root of 1142552261 is about 1045.4229375541.

The spelling of 1142552261 in words is "one billion, one hundred forty-two million, five hundred fifty-two thousand, two hundred sixty-one".