404241557 has 2 divisors, whose sum is σ = 404241558. Its totient is φ = 404241556.

The previous prime is 404241479. The next prime is 404241611. The reversal of 404241557 is 755142404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238578916 + 165662641 = 15446^2 + 12871^2 .

It is a cyclic number.

It is not a de Polignac number, because 404241557 - 2¹² = 404237461 is a prime.

It is a super-2 number, since 2×404241557² = 326822472811568498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404211557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202120778 + 202120779.

It is an arithmetic number, because the mean of its divisors is an integer number (202120779).

Almost surely, 2^404241557 is an apocalyptic number.

It is an amenable number.

404241557 is a deficient number, since it is larger than the sum of its proper divisors (1).

404241557 is an equidigital number, since it uses as much as digits as its factorization.

404241557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 404241557 is about 20105.7592992655. The cubic root of 404241557 is about 739.4014864679.

The spelling of 404241557 in words is "four hundred four million, two hundred forty-one thousand, five hundred fifty-seven".