1255720442 has 16 divisors (see below), whose sum is σ = 1904666400. Its totient is φ = 620871120.

The previous prime is 1255720409. The next prime is 1255720451. The reversal of 1255720442 is 2440275521.

It is a junction number, because it is equal to n+sod(n) for n = 1255720399 and 1255720408.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 55109 + ... + 74487.

It is an arithmetic number, because the mean of its divisors is an integer number (119041650).

Almost surely, 2^1255720442 is an apocalyptic number.

1255720442 is a deficient number, since it is larger than the sum of its proper divisors (648945958).

1255720442 is a wasteful number, since it uses less digits than its factorization.

1255720442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19741.

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

The square root of 1255720442 is about 35436.1459811871. The cubic root of 1255720442 is about 1078.8580871750.

Adding to 1255720442 its reverse (2440275521), we get a palindrome (3695995963).

The spelling of 1255720442 in words is "one billion, two hundred fifty-five million, seven hundred twenty thousand, four hundred forty-two".