1240420241 has 4 divisors (see below), whose sum is σ = 1240590912. Its totient is φ = 1240249572.

The previous prime is 1240420229. The next prime is 1240420261. The reversal of 1240420241 is 1420240421.

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 1240420241 - 2³⁰ = 166678417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240420211) 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, 73925 + ... + 89138.

It is an arithmetic number, because the mean of its divisors is an integer number (310147728).

Almost surely, 2^1240420241 is an apocalyptic number.

It is an amenable number.

1240420241 is a deficient number, since it is larger than the sum of its proper divisors (170671).

1240420241 is an equidigital number, since it uses as much as digits as its factorization.

1240420241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170670.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1240420241 is about 35219.6002390714. The cubic root of 1240420241 is about 1074.4584230029.

Adding to 1240420241 its reverse (1420240421), we get a palindrome (2660660662).

The spelling of 1240420241 in words is "one billion, two hundred forty million, four hundred twenty thousand, two hundred forty-one".