1013642521 has 2 divisors, whose sum is σ = 1013642522. Its totient is φ = 1013642520.

The previous prime is 1013642503. The next prime is 1013642537. The reversal of 1013642521 is 1252463101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 792704025 + 220938496 = 28155^2 + 14864^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013642521 - 2⁵ = 1013642489 is a prime.

It is not a weakly prime, because it can be changed into another prime (1013642321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506821260 + 506821261.

It is an arithmetic number, because the mean of its divisors is an integer number (506821261).

Almost surely, 2^1013642521 is an apocalyptic number.

It is an amenable number.

1013642521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1013642521 is an equidigital number, since it uses as much as digits as its factorization.

1013642521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1013642521 is about 31837.7530771253. The cubic root of 1013642521 is about 1004.5269825047.

The spelling of 1013642521 in words is "one billion, thirteen million, six hundred forty-two thousand, five hundred twenty-one".