1421024521 has 8 divisors (see below), whose sum is σ = 1639206720. Its totient is φ = 1206637008.

The previous prime is 1421024477. The next prime is 1421024551. The reversal of 1421024521 is 1254201241.

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

It is a cyclic number.

It is not a de Polignac number, because 1421024521 - 2¹³ = 1421016329 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1421024492 and 1421024501.

It is not an unprimeable number, because it can be changed into a prime (1421024551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 947866 + ... + 949363.

It is an arithmetic number, because the mean of its divisors is an integer number (204900840).

Almost surely, 2^1421024521 is an apocalyptic number.

It is an amenable number.

1421024521 is a deficient number, since it is larger than the sum of its proper divisors (218182199).

1421024521 is a wasteful number, since it uses less digits than its factorization.

1421024521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897343.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 1421024521 is about 37696.4788939232. The cubic root of 1421024521 is about 1124.2611170578.

Adding to 1421024521 its reverse (1254201241), we get a palindrome (2675225762).

The spelling of 1421024521 in words is "one billion, four hundred twenty-one million, twenty-four thousand, five hundred twenty-one".