401741521 has 2 divisors, whose sum is σ = 401741522. Its totient is φ = 401741520.

The previous prime is 401741507. The next prime is 401741533. The reversal of 401741521 is 125147104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 328878225 + 72863296 = 18135^2 + 8536^2 .

It is a cyclic number.

It is not a de Polignac number, because 401741521 - 2⁷ = 401741393 is a prime.

It is a super-2 number, since 2×401741521² = 322792499390786882, which contains 22 as substring.

It is equal to p_21424129 and since 401741521 and 21424129 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (401741551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200870760 + 200870761.

It is an arithmetic number, because the mean of its divisors is an integer number (200870761).

Almost surely, 2^401741521 is an apocalyptic number.

It is an amenable number.

401741521 is a deficient number, since it is larger than the sum of its proper divisors (1).

401741521 is an equidigital number, since it uses as much as digits as its factorization.

401741521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 401741521 is about 20043.4907388908. The cubic root of 401741521 is about 737.8740546626.

Adding to 401741521 its reverse (125147104), we get a palindrome (526888625).

The spelling of 401741521 in words is "four hundred one million, seven hundred forty-one thousand, five hundred twenty-one".