52146421 has 4 divisors (see below), whose sum is σ = 52164000. Its totient is φ = 52128844.

The previous prime is 52146407. The next prime is 52146427. The reversal of 52146421 is 12464125.

It is a happy number.

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 52146421 - 2⁵ = 52146389 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 (52146427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3121 + ... + 10678.

It is an arithmetic number, because the mean of its divisors is an integer number (13041000).

Almost surely, 2^52146421 is an apocalyptic number.

It is an amenable number.

52146421 is a deficient number, since it is larger than the sum of its proper divisors (17579).

52146421 is a wasteful number, since it uses less digits than its factorization.

52146421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17578.

The product of its digits is 1920, while the sum is 25.

The square root of 52146421 is about 7221.2478838494. The cubic root of 52146421 is about 373.6011194364.

The spelling of 52146421 in words is "fifty-two million, one hundred forty-six thousand, four hundred twenty-one".