1255123042 has 8 divisors (see below), whose sum is σ = 1883742300. Its totient is φ = 627208944.

The previous prime is 1255123031. The next prime is 1255123057. The reversal of 1255123042 is 2403215521.

It can be written as a sum of positive squares in 2 ways, for example, as 1041933841 + 213189201 = 32279^2 + 14601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1255122998 and 1255123016.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171817 + ... + 178972.

Almost surely, 2^1255123042 is an apocalyptic number.

1255123042 is a deficient number, since it is larger than the sum of its proper divisors (628619258).

1255123042 is a wasteful number, since it uses less digits than its factorization.

1255123042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352580.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1255123042 is about 35427.7157321778. The cubic root of 1255123042 is about 1078.6869737027.

Adding to 1255123042 its reverse (2403215521), we get a palindrome (3658338563).

The spelling of 1255123042 in words is "one billion, two hundred fifty-five million, one hundred twenty-three thousand, forty-two".