2540240121 has 4 divisors (see below), whose sum is σ = 3386986832. Its totient is φ = 1693493412.

The previous prime is 2540240119. The next prime is 2540240159. The reversal of 2540240121 is 1210420452.

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 not a de Polignac number, because 2540240121 - 2¹ = 2540240119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540240111) 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, 423373351 + ... + 423373356.

It is an arithmetic number, because the mean of its divisors is an integer number (846746708).

Almost surely, 2^2540240121 is an apocalyptic number.

It is an amenable number.

2540240121 is a deficient number, since it is larger than the sum of its proper divisors (846746711).

2540240121 is an equidigital number, since it uses as much as digits as its factorization.

2540240121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846746710.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 2540240121 is about 50400.7948449228. The cubic root of 2540240121 is about 1364.4519835851.

Adding to 2540240121 its reverse (1210420452), we get a palindrome (3750660573).

The spelling of 2540240121 in words is "two billion, five hundred forty million, two hundred forty thousand, one hundred twenty-one".