1012404521 has 2 divisors, whose sum is σ = 1012404522. Its totient is φ = 1012404520.

The previous prime is 1012404517. The next prime is 1012404559. The reversal of 1012404521 is 1254042101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1002418921 + 9985600 = 31661^2 + 3160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012404521 - 2² = 1012404517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012404493 and 1012404502.

It is not a weakly prime, because it can be changed into another prime (1012404511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506202260 + 506202261.

It is an arithmetic number, because the mean of its divisors is an integer number (506202261).

Almost surely, 2^1012404521 is an apocalyptic number.

It is an amenable number.

1012404521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012404521 is an equidigital number, since it uses as much as digits as its factorization.

1012404521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 1012404521 is about 31818.3048102818. The cubic root of 1012404521 is about 1004.1178602848.

Adding to 1012404521 its reverse (1254042101), we get a palindrome (2266446622).

The spelling of 1012404521 in words is "one billion, twelve million, four hundred four thousand, five hundred twenty-one".