401202521 has 2 divisors, whose sum is σ = 401202522. Its totient is φ = 401202520.

The previous prime is 401202509. The next prime is 401202553. The reversal of 401202521 is 125202104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345550921 + 55651600 = 18589^2 + 7460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401202521 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401202521.

It is not a weakly prime, because it can be changed into another prime (401202721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200601260 + 200601261.

It is an arithmetic number, because the mean of its divisors is an integer number (200601261).

Almost surely, 2^401202521 is an apocalyptic number.

It is an amenable number.

401202521 is a deficient number, since it is larger than the sum of its proper divisors (1).

401202521 is an equidigital number, since it uses as much as digits as its factorization.

401202521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 401202521 is about 20030.0404642627. The cubic root of 401202521 is about 737.5439152630.

Adding to 401202521 its reverse (125202104), we get a palindrome (526404625).

The spelling of 401202521 in words is "four hundred one million, two hundred two thousand, five hundred twenty-one".