1240023601 has 4 divisors (see below), whose sum is σ = 1242047092. Its totient is φ = 1238000112.

The previous prime is 1240023559. The next prime is 1240023611. The reversal of 1240023601 is 1063200421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1063200421 = 67 ⋅15868663.

It can be written as a sum of positive squares in 2 ways, for example, as 85655025 + 1154368576 = 9255^2 + 33976^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240023601 - 2⁹ = 1240023089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240023611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010826 + ... + 1012051.

It is an arithmetic number, because the mean of its divisors is an integer number (310511773).

Almost surely, 2^1240023601 is an apocalyptic number.

It is an amenable number.

1240023601 is a deficient number, since it is larger than the sum of its proper divisors (2023491).

1240023601 is an equidigital number, since it uses as much as digits as its factorization.

1240023601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023490.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1240023601 is about 35213.9688334047. The cubic root of 1240023601 is about 1074.3438869213.

The spelling of 1240023601 in words is "one billion, two hundred forty million, twenty-three thousand, six hundred one".