391436241 has 16 divisors (see below), whose sum is σ = 622408704. Its totient is φ = 213952464.

The previous prime is 391436191. The next prime is 391436251. The reversal of 391436241 is 142634193.

It is not a de Polignac number, because 391436241 - 2¹⁵ = 391403473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391436251) 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 in 15 ways as a sum of consecutive naturals, for example, 404731 + ... + 405696.

It is an arithmetic number, because the mean of its divisors is an integer number (38900544).

Almost surely, 2^391436241 is an apocalyptic number.

It is an amenable number.

391436241 is a deficient number, since it is larger than the sum of its proper divisors (230972463).

391436241 is a wasteful number, since it uses less digits than its factorization.

391436241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810460.

The product of its digits is 15552, while the sum is 33.

The square root of 391436241 is about 19784.7476860333. The cubic root of 391436241 is about 731.5101290322.

The spelling of 391436241 in words is "three hundred ninety-one million, four hundred thirty-six thousand, two hundred forty-one".