1255540442 has 16 divisors (see below), whose sum is σ = 2098119240. Its totient is φ = 559497792.

The previous prime is 1255540441. The next prime is 1255540477. The reversal of 1255540442 is 2440455521.

It can be written as a sum of positive squares in 4 ways, for example, as 553237441 + 702303001 = 23521^2 + 26501^2 .

It is a super-3 number, since 3×1255540442³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1255540399 and 1255540408.

It is not an unprimeable number, because it can be changed into a prime (1255540441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831833 + ... + 833340.

Almost surely, 2^1255540442 is an apocalyptic number.

1255540442 is a deficient number, since it is larger than the sum of its proper divisors (842578798).

1255540442 is a wasteful number, since it uses less digits than its factorization.

1255540442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665217.

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 1255540442 is about 35433.6061105838. The cubic root of 1255540442 is about 1078.8065354313.

Adding to 1255540442 its reverse (2440455521), we get a palindrome (3695995963).

The spelling of 1255540442 in words is "one billion, two hundred fifty-five million, five hundred forty thousand, four hundred forty-two".