207742257 has 12 divisors (see below), whose sum is σ = 315865680. Its totient is φ = 131205528.

The previous prime is 207742247. The next prime is 207742259. The reversal of 207742257 is 752247702.

It is not a de Polignac number, because 207742257 - 2¹⁸ = 207480113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (207742259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 607263 + ... + 607604.

It is an arithmetic number, because the mean of its divisors is an integer number (26322140).

Almost surely, 2^207742257 is an apocalyptic number.

It is an amenable number.

207742257 is a deficient number, since it is larger than the sum of its proper divisors (108123423).

207742257 is a wasteful number, since it uses less digits than its factorization.

207742257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214892 (or 1214889 counting only the distinct ones).

The product of its (nonzero) digits is 54880, while the sum is 36.

The square root of 207742257 is about 14413.2667012027. The cubic root of 207742257 is about 592.2543809152.

Adding to 207742257 its reverse (752247702), we get a palindrome (959989959).

Subtracting 207742257 from its reverse (752247702), we obtain a palindrome (544505445).

The spelling of 207742257 in words is "two hundred seven million, seven hundred forty-two thousand, two hundred fifty-seven".