401246557 has 2 divisors, whose sum is σ = 401246558. Its totient is φ = 401246556.

The previous prime is 401246519. The next prime is 401246561. The reversal of 401246557 is 755642104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206755641 + 194490916 = 14379^2 + 13946^2 .

It is a cyclic number.

It is not a de Polignac number, because 401246557 - 2¹⁹ = 400722269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401246507) 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, 200623278 + 200623279.

It is an arithmetic number, because the mean of its divisors is an integer number (200623279).

Almost surely, 2^401246557 is an apocalyptic number.

It is an amenable number.

401246557 is a deficient number, since it is larger than the sum of its proper divisors (1).

401246557 is an equidigital number, since it uses as much as digits as its factorization.

401246557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 401246557 is about 20031.1396830036. The cubic root of 401246557 is about 737.5708985561.

The spelling of 401246557 in words is "four hundred one million, two hundred forty-six thousand, five hundred fifty-seven".