1142248641 has 4 divisors (see below), whose sum is σ = 1522998192. Its totient is φ = 761499092.

The previous prime is 1142248619. The next prime is 1142248651. The reversal of 1142248641 is 1468422411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1142248641 - 2²¹ = 1140151489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1142248651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190374771 + ... + 190374776.

It is an arithmetic number, because the mean of its divisors is an integer number (380749548).

Almost surely, 2^1142248641 is an apocalyptic number.

It is an amenable number.

1142248641 is a deficient number, since it is larger than the sum of its proper divisors (380749551).

1142248641 is an equidigital number, since it uses as much as digits as its factorization.

1142248641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380749550.

The product of its digits is 12288, while the sum is 33.

The square root of 1142248641 is about 33797.1691270142. The cubic root of 1142248641 is about 1045.3303263469.

The spelling of 1142248641 in words is "one billion, one hundred forty-two million, two hundred forty-eight thousand, six hundred forty-one".