52521405 has 8 divisors (see below), whose sum is σ = 84034272. Its totient is φ = 28011408.

The previous prime is 52521373. The next prime is 52521421. The reversal of 52521405 is 50412525.

It is a happy number.

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

It is not a de Polignac number, because 52521405 - 2⁵ = 52521373 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1750699 + ... + 1750728.

It is an arithmetic number, because the mean of its divisors is an integer number (10504284).

Almost surely, 2^52521405 is an apocalyptic number.

It is an amenable number.

52521405 is a deficient number, since it is larger than the sum of its proper divisors (31512867).

52521405 is a wasteful number, since it uses less digits than its factorization.

52521405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501435.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 52521405 is about 7247.1653078980. The cubic root of 52521405 is about 374.4945011174.

The spelling of 52521405 in words is "fifty-two million, five hundred twenty-one thousand, four hundred five".