1012041521 has 2 divisors, whose sum is σ = 1012041522. Its totient is φ = 1012041520.

The previous prime is 1012041497. The next prime is 1012041539. The reversal of 1012041521 is 1251402101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 933913600 + 78127921 = 30560^2 + 8839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012041521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012041521.

It is not a weakly prime, because it can be changed into another prime (1012041551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506020760 + 506020761.

It is an arithmetic number, because the mean of its divisors is an integer number (506020761).

Almost surely, 2^1012041521 is an apocalyptic number.

It is an amenable number.

1012041521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012041521 is an equidigital number, since it uses as much as digits as its factorization.

1012041521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1012041521 is about 31812.6000352062. The cubic root of 1012041521 is about 1003.9978363392.

Adding to 1012041521 its reverse (1251402101), we get a palindrome (2263443622).

The spelling of 1012041521 in words is "one billion, twelve million, forty-one thousand, five hundred twenty-one".