2599542021 has 8 divisors (see below), whose sum is σ = 3469249024. Its totient is φ = 1731431520.

The previous prime is 2599542013. The next prime is 2599542031. The reversal of 2599542021 is 1202459952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2599542021 - 2³ = 2599542013 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 (2599542031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395320 + ... + 401841.

It is an arithmetic number, because the mean of its divisors is an integer number (433656128).

Almost surely, 2^2599542021 is an apocalyptic number.

It is an amenable number.

2599542021 is a deficient number, since it is larger than the sum of its proper divisors (869707003).

2599542021 is a wasteful number, since it uses less digits than its factorization.

2599542021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798251.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 2599542021 is about 50985.7040845765. The cubic root of 2599542021 is about 1374.9881248120.

The spelling of 2599542021 in words is "two billion, five hundred ninety-nine million, five hundred forty-two thousand, twenty-one".