52787421 has 12 divisors (see below), whose sum is σ = 76320348. Its totient is φ = 35158464.

The previous prime is 52787401. The next prime is 52787429. The reversal of 52787421 is 12478725.

It can be written as a sum of positive squares in 2 ways, for example, as 33524100 + 19263321 = 5790^2 + 4389^2 .

It is not a de Polignac number, because 52787421 - 2¹¹ = 52785373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52787429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10851 + ... + 14943.

It is an arithmetic number, because the mean of its divisors is an integer number (6360029).

Almost surely, 2^52787421 is an apocalyptic number.

It is an amenable number.

52787421 is a deficient number, since it is larger than the sum of its proper divisors (23532927).

52787421 is a wasteful number, since it uses less digits than its factorization.

52787421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5532 (or 5529 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 52787421 is about 7265.4952343250. The cubic root of 52787421 is about 375.1256965296.

The spelling of 52787421 in words is "fifty-two million, seven hundred eighty-seven thousand, four hundred twenty-one".