1240842241 has 4 divisors (see below), whose sum is σ = 1241180500. Its totient is φ = 1240503984.

The previous prime is 1240842233. The next prime is 1240842269. The reversal of 1240842241 is 1422480421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1422480421 = 29 ⋅49051049.

It can be written as a sum of positive squares in 2 ways, for example, as 335073025 + 905769216 = 18305^2 + 30096^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240842241 - 2³ = 1240842233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240842041) 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, 163566 + ... + 170983.

It is an arithmetic number, because the mean of its divisors is an integer number (310295125).

Almost surely, 2^1240842241 is an apocalyptic number.

It is an amenable number.

1240842241 is a deficient number, since it is larger than the sum of its proper divisors (338259).

1240842241 is an equidigital number, since it uses as much as digits as its factorization.

1240842241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338258.

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 1240842241 is about 35225.5907118674. The cubic root of 1240842241 is about 1074.5802553815.

The spelling of 1240842241 in words is "one billion, two hundred forty million, eight hundred forty-two thousand, two hundred forty-one".