901010521 has 2 divisors, whose sum is σ = 901010522. Its totient is φ = 901010520.

The previous prime is 901010497. The next prime is 901010543. The reversal of 901010521 is 125010109.

901010521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 545876496 + 355134025 = 23364^2 + 18845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-901010521 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (901010921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 450505260 + 450505261.

It is an arithmetic number, because the mean of its divisors is an integer number (450505261).

Almost surely, 2^901010521 is an apocalyptic number.

It is an amenable number.

901010521 is a deficient number, since it is larger than the sum of its proper divisors (1).

901010521 is an equidigital number, since it uses as much as digits as its factorization.

901010521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 901010521 is about 30016.8372917601. The cubic root of 901010521 is about 965.8506002995.

The spelling of 901010521 in words is "nine hundred one million, ten thousand, five hundred twenty-one".