255742237 has 4 divisors (see below), whose sum is σ = 270785916. Its totient is φ = 240698560.

The previous prime is 255742163. The next prime is 255742327. The reversal of 255742237 is 732247552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 164711556 + 91030681 = 12834^2 + 9541^2 .

It is a cyclic number.

It is not a de Polignac number, because 255742237 - 2²⁷ = 121524509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 255742196 and 255742205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255742637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7521814 + ... + 7521847.

It is an arithmetic number, because the mean of its divisors is an integer number (67696479).

Almost surely, 2^255742237 is an apocalyptic number.

It is an amenable number.

255742237 is a deficient number, since it is larger than the sum of its proper divisors (15043679).

255742237 is a wasteful number, since it uses less digits than its factorization.

255742237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15043678.

The product of its digits is 117600, while the sum is 37.

The square root of 255742237 is about 15991.9428775868. The cubic root of 255742237 is about 634.7472381495.

Adding to 255742237 its reverse (732247552), we get a palindrome (987989789).

The spelling of 255742237 in words is "two hundred fifty-five million, seven hundred forty-two thousand, two hundred thirty-seven".