52401421 has 4 divisors (see below), whose sum is σ = 52421152. Its totient is φ = 52381692.

The previous prime is 52401407. The next prime is 52401451. The reversal of 52401421 is 12410425.

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 52401421 - 2²¹ = 50304269 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 (52401451) 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, 5121 + ... + 11446.

It is an arithmetic number, because the mean of its divisors is an integer number (13105288).

Almost surely, 2^52401421 is an apocalyptic number.

It is an amenable number.

52401421 is a deficient number, since it is larger than the sum of its proper divisors (19731).

52401421 is a wasteful number, since it uses less digits than its factorization.

52401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19730.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 52401421 is about 7238.8825795146. The cubic root of 52401421 is about 374.2091088529.

Adding to 52401421 its reverse (12410425), we get a palindrome (64811846).

The spelling of 52401421 in words is "fifty-two million, four hundred one thousand, four hundred twenty-one".