521421452 has 24 divisors (see below), whose sum is σ = 929562480. Its totient is φ = 255875840.

The previous prime is 521421419. The next prime is 521421491. The reversal of 521421452 is 254124125.

521421452 is nontrivially palindromic in base 5.

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, 43427 + ... + 54117.

It is an arithmetic number, because the mean of its divisors is an integer number (38731770).

Almost surely, 2^521421452 is an apocalyptic number.

It is an amenable number.

521421452 is a deficient number, since it is larger than the sum of its proper divisors (408141028).

521421452 is a wasteful number, since it uses less digits than its factorization.

521421452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10921 (or 10919 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 521421452 is about 22834.6546284370. The cubic root of 521421452 is about 804.8772118314.

Adding to 521421452 its reverse (254124125), we get a palindrome (775545577).

The spelling of 521421452 in words is "five hundred twenty-one million, four hundred twenty-one thousand, four hundred fifty-two".