1240211342542 has 4 divisors (see below), whose sum is σ = 1860317013816. Its totient is φ = 620105671270.

The previous prime is 1240211342519. The next prime is 1240211342609. The reversal of 1240211342542 is 2452431120421.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310052835634 + ... + 310052835637.

It is an arithmetic number, because the mean of its divisors is an integer number (465079253454).

Almost surely, 2^{1240211342542} is an apocalyptic number.

1240211342542 is a deficient number, since it is larger than the sum of its proper divisors (620105671274).

1240211342542 is an equidigital number, since it uses as much as digits as its factorization.

1240211342542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620105671273.

The product of its (nonzero) digits is 15360, while the sum is 31.

Adding to 1240211342542 its reverse (2452431120421), we get a palindrome (3692642462963).

The spelling of 1240211342542 in words is "one trillion, two hundred forty billion, two hundred eleven million, three hundred forty-two thousand, five hundred forty-two".