2540274921 has 6 divisors (see below), whose sum is σ = 3669286010. Its totient is φ = 1693516608.

The previous prime is 2540274887. The next prime is 2540274959. The reversal of 2540274921 is 1294720452.

2540274921 is a `hidden beast` number, since 2 + 540 + 27 + 4 + 92 + 1 = 666.

2540274921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2540160000 + 114921 = 50400^2 + 339^2 .

It is not a de Polignac number, because 2540274921 - 2⁶ = 2540274857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2540274421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141126376 + ... + 141126393.

Almost surely, 2^2540274921 is an apocalyptic number.

It is an amenable number.

2540274921 is a deficient number, since it is larger than the sum of its proper divisors (1129011089).

2540274921 is a wasteful number, since it uses less digits than its factorization.

2540274921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282252775 (or 282252772 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 2540274921 is about 50401.1400763911. The cubic root of 2540274921 is about 1364.4582143231.

The spelling of 2540274921 in words is "two billion, five hundred forty million, two hundred seventy-four thousand, nine hundred twenty-one".