1240344101 has 4 divisors (see below), whose sum is σ = 1240418592. Its totient is φ = 1240269612.

The previous prime is 1240344097. The next prime is 1240344143. The reversal of 1240344101 is 1014430421.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1014430421 = 197 ⋅5149393.

It is a cyclic number.

It is not a de Polignac number, because 1240344101 - 2² = 1240344097 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 (1240344901) 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, 446 + ... + 49808.

It is an arithmetic number, because the mean of its divisors is an integer number (310104648).

Almost surely, 2^1240344101 is an apocalyptic number.

It is an amenable number.

1240344101 is a deficient number, since it is larger than the sum of its proper divisors (74491).

1240344101 is an equidigital number, since it uses as much as digits as its factorization.

1240344101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74490.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1240344101 is about 35218.5192902825. The cubic root of 1240344101 is about 1074.4364382659.

Adding to 1240344101 its reverse (1014430421), we get a palindrome (2254774522).

The spelling of 1240344101 in words is "one billion, two hundred forty million, three hundred forty-four thousand, one hundred one".