2545040421 has 48 divisors (see below), whose sum is σ = 4610930688. Its totient is φ = 1314122400.

The previous prime is 2545040419. The next prime is 2545040431. The reversal of 2545040421 is 1240405452.

2545040421 is a `hidden beast` number, since 254 + 5 + 0 + 404 + 2 + 1 = 666.

2545040421 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2545040421 - 2¹ = 2545040419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545040401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104736 + ... + 126726.

It is an arithmetic number, because the mean of its divisors is an integer number (96061056).

Almost surely, 2^2545040421 is an apocalyptic number.

2545040421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2545040421 is a deficient number, since it is larger than the sum of its proper divisors (2065890267).

2545040421 is a wasteful number, since it uses less digits than its factorization.

2545040421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22182 (or 22179 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 2545040421 is about 50448.3936414233. The cubic root of 2545040421 is about 1365.3109125522.

Adding to 2545040421 its reverse (1240405452), we get a palindrome (3785445873).

The spelling of 2545040421 in words is "two billion, five hundred forty-five million, forty thousand, four hundred twenty-one".