63145421 has 4 divisors (see below), whose sum is σ = 64852092. Its totient is φ = 61438752.

The previous prime is 63145403. The next prime is 63145427. The reversal of 63145421 is 12454136.

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 50965321 + 12180100 = 7139^2 + 3490^2 .

It is a cyclic number.

It is not a de Polignac number, because 63145421 - 2¹⁸ = 62883277 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 (63145427) 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, 853280 + ... + 853353.

It is an arithmetic number, because the mean of its divisors is an integer number (16213023).

Almost surely, 2^63145421 is an apocalyptic number.

It is an amenable number.

63145421 is a deficient number, since it is larger than the sum of its proper divisors (1706671).

63145421 is a wasteful number, since it uses less digits than its factorization.

63145421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706670.

The product of its digits is 2880, while the sum is 26.

The square root of 63145421 is about 7946.4093149044. The cubic root of 63145421 is about 398.2116434512.

Adding to 63145421 its reverse (12454136), we get a palindrome (75599557).

The spelling of 63145421 in words is "sixty-three million, one hundred forty-five thousand, four hundred twenty-one".