1242136141 has 4 divisors (see below), whose sum is σ = 1271023072. Its totient is φ = 1213249212.

The previous prime is 1242136097. The next prime is 1242136151. The reversal of 1242136141 is 1416312421.

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 1242136141 - 2²⁹ = 705265229 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 (1242136151) 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, 14443401 + ... + 14443486.

It is an arithmetic number, because the mean of its divisors is an integer number (317755768).

Almost surely, 2^1242136141 is an apocalyptic number.

It is an amenable number.

1242136141 is a deficient number, since it is larger than the sum of its proper divisors (28886931).

1242136141 is an equidigital number, since it uses as much as digits as its factorization.

1242136141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28886930.

The product of its digits is 1152, while the sum is 25.

The square root of 1242136141 is about 35243.9518357406. The cubic root of 1242136141 is about 1074.9536352096.

Adding to 1242136141 its reverse (1416312421), we get a palindrome (2658448562).

The spelling of 1242136141 in words is "one billion, two hundred forty-two million, one hundred thirty-six thousand, one hundred forty-one".