2526661421 has 4 divisors (see below), whose sum is σ = 2574334332. Its totient is φ = 2478988512.

The previous prime is 2526661411. The next prime is 2526661429. The reversal of 2526661421 is 1241666252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 736525321 + 1790136100 = 27139^2 + 42310^2 .

It is a cyclic number.

It is not a de Polignac number, because 2526661421 - 2³⁰ = 1452919597 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 (2526661429) 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 3 ways as a sum of consecutive naturals, for example, 23836376 + ... + 23836481.

It is an arithmetic number, because the mean of its divisors is an integer number (643583583).

Almost surely, 2^2526661421 is an apocalyptic number.

It is an amenable number.

2526661421 is a deficient number, since it is larger than the sum of its proper divisors (47672911).

2526661421 is an equidigital number, since it uses as much as digits as its factorization.

2526661421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47672910.

The product of its digits is 34560, while the sum is 35.

The square root of 2526661421 is about 50265.9071439082. The cubic root of 2526661421 is about 1362.0164402023.

The spelling of 2526661421 in words is "two billion, five hundred twenty-six million, six hundred sixty-one thousand, four hundred twenty-one".