4040654021 has 4 divisors (see below), whose sum is σ = 4041514272. Its totient is φ = 4039793772.

The previous prime is 4040654003. The next prime is 4040654047. The reversal of 4040654021 is 1204560404.

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 a cyclic number.

It is not a de Polignac number, because 4040654021 - 2⁶ = 4040653957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040654081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423041 + ... + 432486.

It is an arithmetic number, because the mean of its divisors is an integer number (1010378568).

Almost surely, 2^4040654021 is an apocalyptic number.

It is an amenable number.

4040654021 is a deficient number, since it is larger than the sum of its proper divisors (860251).

4040654021 is an equidigital number, since it uses as much as digits as its factorization.

4040654021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860250.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 4040654021 is about 63566.1389499158. The cubic root of 4040654021 is about 1592.7607878457.

The spelling of 4040654021 in words is "four billion, forty million, six hundred fifty-four thousand, twenty-one".